Obsidian

[tessus]

I couldn't find the other ones, but this one was one of the comments I talked about:

[Feature request] Export to ENEX

The way it works in general is that apps support importing various formats, and then export their own format, plus open formats (for example Joplin can export to Markdown, HTML, PDF or text files). It's rare that an app would support exporting to a closed, proprietary format, unless perhaps it's extremely popular (PSD or PDF for instance makes sense). So that's why I'm not keen on supporting ENEX export, or else why stop there? There's a ton of note-taking apps which are equally or more popular…

Joplin supports already the formats md and html (besides JEX, RAW, PDF). Other apps also use md or html, so they should provide a proper import function. There have also been several topics in this forum on how to migrate data from or to Joplin. Sometimes it takes several steps and/or scripts, but it is possible.

Either way, it's not feasible to support dozens of different import/export combinations in the core app.
The plugin system is the perfect way to handle that. With it you can also take care of meta data, which is not included in the standard md and html export formats (but it is in JEX and RAW).