To tell a long story short: I discovered Joplin in summer 2021, tested it till autumn and migrated some data in early November. Today I exported everything else from Evernote and imported it into Joplin.
I have not used Evernote since November and won't do it again (hopefully).
So now I'm considering to delete my notes and my account on Evernote. But not today, maybe in some weeks...hard to tell why I hesitate...
So finally: When did you do it?
I haven't deleted mine for a few reasons.
as paid service, I think it makes sense to cancel when you tested the backup workflow and its relation to the other clouds you use.
If it's free and you're not afraid of another popular service data leak, heck, I say let it hang there
Seems I am not the only one, who doesn‘t tend to leave evernote completely. Your reasons are rational.
I can imagine, others act more disruptively.
I guess that depends on what you call "leaving". My Evernote account is so old I don't remember even an email provider it's setup for, let alone username or password.
For me the data there is mostly unusable and irrelevant. I never deleted it mostly because of complacency rather than an actual wish to keep using it someday.
The same way I never deleted emails from old Yahoo mail accounts or cleaned up abandoned clouds.
To rephrase it into more general question I actually wonder if anyone has a good reason to clean this sort of stuff if it costs you nothing to keep it?
The only thing I fear is security breach that might leak some of the data I don't care about but for outsiders might be worth their time exploiting.
My standards are always increasing in that regard but if an attacker finds my note archive from 2004, who knows, maybe there's some sensitive data that still holds true today.
Makes me think how often we change security questions on eBay, PayPal, other services that could have been around for a while. Probably like never, yet they often do have valid credit card information, shipping addresses, tax filings etc etc.
Same goes for me, so maybe I should change the "former" in my name... Subscription is cancelled, but something holds me back from deleting all my notes, although lots of new ones reside in Joplin only. I'm not quite sure if my "reasons are rational" because the way to privacy seems to be paved with painful disruption:
That's why I enter every new password both in a commercial PW manager (my former solution; free plan) and in KeePass XC (my new solution): no good in terms of privacy, but good to know to have a fallback solution (and easier to use on mobile devices)
That's why I still play around with OneNote and am sometimes tempted to switch over... Before Evernote I used to play around with Wunderlist, which is now Microsoft ToDo and offers a good integration into Outlook: no good in terms of privacy AT ALL, but terribly useful when it comes to task management and integration with mail/contacts/calendar (I've given up on Joplin as a task manager). OneNote's integration with Outlook tasks is a total mess, though, especially on mobile (where you can't even use tags properly).
All stated above could be left behind for good if I chose to "act more disruptively", but No. 3 is a real issue (at least for me who is new to the world of markdown - and still can't figure out what it was invented for...): exporting from Joplin works like a charm, but which application (editors or scripts excepted) can handle all my data properly? So it's easy to migrate away from Evernote, but if I ever choose to leave Joplin: what can I do with tons of markdown files and even more resources?
Well, there's an easy way out: Stay with Joplin and be happy:)
Moved across to Joplin almost exactly two years ago. Never looked back... then about a year later I deleted all my Evernote notes just before the premium expired. I''m so happy I missed the whole v10 debacle. Even if Joplin doesn't succeed (which it will), I'll never, EVER move back to Evernote!
Slightly off topic but essentially its a markup language, it simply allows formatting of text without storing the formatting as metadata, instead it is just plain text. In that sense it is no different from HTML (which is normally what markdown is converted into when displaying it).
So in the same way that a web browser knows to read the text <b>this will be bolded</b> and display it as this will be bolded rather than including the tags, a markdown renderer knows it has to do the same thing when it sees **stars around some words** instead.
The only difference is that markdown is significantly easier to write and more importantly to read than something like html - a markdown document is just as easy to read in plain text as it is in its rendered form.
Also because the real "formatting" is done by a rendering step rather than baked into the markdown code itself it allows you to display that rendered output differently depending on what you want. E.g. if you were using markdown docs for online documentation (like the Joplin help website) then you could change all the subheaders from showing as black, 20pt, bold to blue, 18pt, italics without ever needing to change the content of the documentation itself.
In recent years markdown is becoming more and more familiar to people outside of "tech" circles - where it was mostly used for documention (like on github readme files) to a more general useage that allows one to write far more fluidly when they don't need to keep thinking of the exact formatting as they use a document - I hate having to go back and use word processors for documention at work now because it is so much less efficient having to battle templates and maintain the formatting as I go.
It is a well supported format that can be converted to pretty much any number of other formats with a bit of scripting and some help. Pandoc allows you to perform conversion like this - you could literally convert your markdown files into html and they will display in your browser. People write tools and scripts that then allow the conversion of one format to import into a particular application (a bit like how Joplin can ingest .enex files as well as markdown directories).
I'm in a similar situation. New stuff goes into Joplin but there are still things in my Evernote storage locker that I keep around. I'll probably clean it out as my premium subscription deadline approaches.
I doubt I'll ever completely delete the application from all machines however as the .enex file format is useful. As an example, I've exported dummy notes from Evernote as a workaround for Joplin's default lower case tags. Joplin will preserve mixed case and various UTF-8 characters in tags during the import process, so I can satisfy my OCD with tags such as "I²C".
Thank you very much for the detailed explanation! I was familiar with md's basic functionality, but I'm afraid I belong to the majority (?) of people who got accustomed to rich text editing and for whom markdown feels like a step back to an age before WYSIWIG (if they're old enough to remember that time). For those coming from HTML, markdown may be a welcome simplification, for those not writing for the web but for themselves (or for print) it can feel like making things more complicated. But you have a good point about word processors: a complex setup of formatting templates can make life rather hard, so maybe it's a good idea to get rid of (mostly proprietary) forms of metadata and get accustomed to using tags in md, HTML or LaTeX.
So it's a great relief to still have a rich text editor in Joplin (despite of its shortcomings). I heavily rely on copying and pasting in and out of Joplin: That was never an issue with Evernote or OneNote, but in Joplin the only way to get "bold" and "(numbered) list" in and out (the formatting options I use most) is switching to the rich text editor (which I don't use for composing notes).
Coming back to the original topic: I think we could encourage a lot of people to leave Evernote for good, if Joplin offered a "come back option", namely allowing exporting to ENEX. But I can understand that offering an export option for a proprietory format is a "no go" for open source developers. ENEX and DOCX are still quasi-standards, but if more and more people become interested in privacy and open source topics, there could be some change in the future (the distant future, I'm afraid to say). So maybe we should feel encouraged by @Sophia and @Wimvan in this thread to "act more disruptively" and ditch Evernote, MS Word and the like for good...
Just to add my two cents: I switched from Evernote to Joplin two years ago and kept the notes maybe for a month or two...I never really looked back and besides I quite like it to delete accounts since my password manager is always overflowing anyways 
Kind regards
Before Joplin I had only really used markdown for forum posts and even then I had to google the syntax each time. However I'm now at a point where I won't go back, I find it so much more efficient to not have to worry too much about the formatting (and the fact that you can make large scale formatting changes in markdown by doing a simple find & replace - which is actually what I did to convert my underlined/bolded "headers" from Evernote into md # Headers). Once I got used to the basic syntax I ditched the richtext editor entirely and haven't looked back.
I started with Evernote back when it was a paid product. I bought several upgrades until it became a "free" product with cloud sync. I became frustrated when they limited access to the free product to 2 devices, I had 4. The online version sufficed for 2 of them, so I put up with it. I searched every few months for replacements and found a few, all of them paled in comparison.
I then found Joplin, I believe it was 2019. It was not ready for prime time but showed promise. In 2020 it really started to shine and I exported from EverNote and started to use Joplin. I kept both until the fall of 2020 and stopped using EverNote. Sometime in 2021 I deleted all my note on EverNote, removed all the apps and left it completely. I've been using Joplin exclusively ever since.
My needs are modest, I needed none of the advanced features of EverNote. I was intending to stay with EverNote but became frustrated with their increased "featureitis" and costs.
Haha oh it wasn't my intention to make your choice for you. Like the post above mine, I grew increasingly frustrated with Evernote but I felt trapped because there were no alternatives at the time (I hate OneNote).
When one day they almost doubled the price and crippled the free version and their callous attitude at that time I felt like I was in a vice... Until I found Joplin and everything suddenly fell into place.
So in my case I have some hard feelings towards Evernote and their awful, hardnosed community but don't let me influence your decisions in that regard 
Edit: markdown does need some getting used to (and I too am old enough to have worked with WordPerfect 5.1 and raw HTML), but I have come to appreciate the freedom it offers. Perhaps a side topic but would any of the external editors be easier for you to copy and paste content to Word etc?
No, no, don't worry. I'm the kind of guy who has once a year the strong need to tidy things up. But I'm also too hesitant to toss things away directly. So in most cases I put things in the cellar to see wether I will need them in the future. And of course I won't in 99% of all cases.
But luckily, I have also these days, where I go down to my cellar and dump a lot of stuff I stored there easily. That's my way to keep the balance between holding on and letting go things. So I think I will handle Evernote the same way: keep it for some transitional period and then erase it as far as I could: apps, notes, accounts...
Right, it took me almost a full year as well to finally let go. Back then Joplin was a lot newer and felt a little rough at the edges still, plus I was in a near constant state of panic of losing notes But their syncing (first through Dropbox, recently through Joplin Cloud) has proven to be rock solid. Combine that with the terrific backup plugin and I can't possibly lose my notes even if I tried 
I haven't even mentioned that Joplin's web clipper is even better than Evernote's, it has cleaner looking notes, a super responsive dev team, rapid development, actual implementation of ideas, clear communication of what can and can't be done, and... well... let's just say the opposite of what I was used to with Evernote and here we are - Joplin is stuck with me 
I cannot say anything bad about the Evernote community, but what I discussed there was not much more than UX on mobile. I think it's little things that can lead to disgruntled users (at least in my case): the sheer inability to adjust viewing size in Evernote for iOS (as opposed to Android). If I hadn't changed from Samsung to Apple, I'd probably still be a happy Evernote user.
I still think UI/UX on mobile devices is absolutely vital nowadays (that's the reason why I chose to use MS ToDo instead of Joplin for my daily task management only recently), but the overall package (encryption, various syncing methods, GREAT community, etc.) means that Joplin cannot be replaced so easily - and that's what people used to say about Evernote before v.10, didn't they?
Well I have to respectfully disagree with your there. At one point a friend and I were discussing Joplin vs Obsidian. We had both imported our notes from Evernote to Joplin. It literally took 5 minutes to switch from Joplin to Obsidian... with basically no loss of any functionality (disclaimer: neither of us are heavily into tagging, so I can't comment on how well that transfers over).
I actually think the portability of Joplin is excellent for the very reason that it uses a widely accepted format (markdown), just like Evernote (enex).
Funny enough he chose to stay with Obsidian and I very definitely prefer Joplin.
Really it all comes down to preference and there simply isn't a right or wrong choice to make when it comes to picking a preferred note taking app. I certainly hope no one makes their decision based on how great or not great the community is 
Obsidian has a good marketing and appeals with its visualization, but something made me think, it will go Evernotes way of monetization. Everything nice and free now, but later...don't get me wrong, it's ok to make a project grow and make it profitable that way later. But I prefer not to be part of such a project. I don't like to be pushed by ads and limitations while using something I chose when it was nice and free.
That’s right: Just like Joplin, Obsidian seems to have made good improvements over the last couple of years. Last time I looked at it, it didn’t even have a mobile app. Maybe it’s not the best of choices for markdown newbies like me, but it’s encouraging to hear that markdown guarantees portability (at least between the two of them).
As it’s not open source, it’s not a true rival of Joplin, though (shouldn’t really say this because I’ve recommended Microsoft ToDo twice in this thread;-). So you’re absolutely right: everyone according to their needs. I’ll definitely stay an ardent supporter of Joplin, but it will be interesting to see if Obsidian’s iOS app can perform background syncing (which Joplin never will because of React Native, if I’ve understood that correctly).