In many ways, the silky-smooth convenience offered by modern computer software makes everything much harder to learn about and understand. For anyone that used zip files before this Windows feature, the problem is obvious - but for younger people it’s not obvious at all. Heck, a lot of people can’t even tell whether or not a file is locally on their computer - let alone whether it is compressed in some other file.
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.)