Hi
I wanted to answer to your initial interrogation about the popularity of Obsidian through different features I learned to use in recent days.
I was, during 10 years, an Evernote user, and some months ago, I migrated quite easily all my notes from Evernote to Joplin.
But I was a bit disappointed by the tasks dates managing by Joplin. My search on the Joplin forum didn't give me much hope to get satisfaction apart from the naming of tasks with a prefixed date, not very convincing IMHO.
So I kept on searching for other solutions.
With Obsidian , I found recently a quite ideal solution : dates are managed through tasks in the files with or without due date, start date... inside the files, with options like recurring tasks.
In a file, you can use multiple dated tasks or subtasks and for example in a dedicated file , you can write a query that give you the due tasks of the day, week, month, year as you need, on the whole vault, or a filtered part of it and manage simply the completion of tasks or delay for one day the due date through a dedicated icon or link easily the file in which the task is written .
Globally, the search functions on word , tag ,.. are also very efficient.
Another feature that is very interesting for me are links and backlinks between files : you create a file and you link it with existing files or you initialize in it the name of future files without creating them, just to prepare your work.
For example, in a daily note, you list your different recurring or not recurring meetings , and when ready, you click on the link , and you take your notes in the appropriate file.
If you change a file's name, all the links and backlinks are automatically updated.
As in a network, you can move from file to file through the links or backlinks.
You only have to create a one direction link between 2 files in one of the 2 files, the linked file keeps memory in itself of the first file (backlinks).
I use also call outs for the text formatting.
Finally, I work with Obsidian on multiple devices through Dropbox sync.
Just a beginner in Obsidian, but have some fun using it.