No discussion of note taking apps is complete without Zim Desktop Wiki [1], so let me be the one who sings its praise! It's less web or mobile oriented than Joplin but gives me everything I need. Plain text files, syncing, lots of plugins. And task management, oh boy. Task management is second to none, including orgmode. I'm a faithful user for years now and I am still happy I found it.
Also an extremely happy Zim user for desktop notes, projects & work journal.
Recently I was looking for a self-hosted equivalent to Google Keep (which I use mainly for lists, quick notes and web snippets), and tried out Joplin. It looked pretty good, but I wanted a web app frontend, which Joplin doesn't seem to have. I'm now trying out Memos [1] now, and it's pretty good so far (though I would love to see postgres support in Memos as well as the current sqlite DB).
[1] https://zim-wiki.org/