My only real experience with matrix was joining a community server for some program because I had a problem and couldn't get more info elsewhere. Started off that I couldn't read any past messages, I guess because encryption? Alright, so I asked my question. Come back the next day, and because my browser deletes cookies on close, I couldn't log in because I had no logged in device to confirm the login with, or something like this. Gave up. Maybe there was some recovery codes on sign up that I missed, but I always save those.