I use this and it's hooked into my nextcloud. Good to go.

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One question I have - is it able to be stored in plaintext, meaning I could version control it with git to share with a team? I wouldn't be interested in security in that case, just the ability to keep notes collaboratively without having to pay for a locked proprietary hosting solution.

That's the big criteria I had last time I looked into this and I didn't find anything. I don't know why I missed joplin, but I don't remember seeing it.

what's not to like? Poor ui, bad syncing. Good software, not perfect.