Thanks! I'll add it to my list. I'm not already using mongo or meteor and would rather prefer something using mysql/postgres since I already have those.
Focalboard does look interesting, I'm downloading the desktop app now to try it that way. I remember liking mattermost when it first started, but haven't really used it much since then! The dual license of mattermost/focalboard is kinda weird, but I don't think it'd affect me at all.