My latest favourite is missing: Note Taking Apps:
Joplin is good for organising text-based notes, so I’m not surprised to see that on your list. But xournal is a for mixed drawing / hand-writing / text, etc. So it’s a different use-case to Joplin. (It would be perfect if Joplin supported xournal notes; so that you could write with xournal and then organise with Joplin. … But that hasn’t yet come to pass.)
Yeah. They’ve done a good job. Strategically its so that Steam can’t easily be crushed under Microsoft’s enormous boot. So it’s a good forward-thinking commitment that everyone can benefit from. (Everyone except Microsoft, I suppose.)