I’ve feel like I’ve used Plex forever. I also feel like every couple years I try Jellyfin to see how it’s going. Recently I tried it again because of Plex restriction on more than one user.
Well, I just tried it again and it’s substantially improved! This time it actually properly detected most of my library!
Also the Android TV app is AWESOME! No more glitches, lagging, and freezing trying to play my stuff like Plex did. It is butter smooth.
Wow! I’m impressed and I just deleted Plex. Good riddance.
Not OP, but I can answer part of your questions:
I have Plex and Jellyfin running off the exact same media library no problem at all. So there should be zero need to modify anything–if anything Jellyfin seems a little better at catching “extras” folders than Plex.
The Jellyfin app plays music–but it’s definitely NOT a music app. I always hear Symfonium highly recommended, but have not yet given it a whirl myself.