I can only tell you that personally I'm interested in trying out Navidrome because I don't like all my eggs in one basket (Jellyfin is more complex sw for sure too) and I think I'm not the only one caring more about my music collection than movies and tv. But I did try Jellyfin for music (not with my main library) and it works very well, Finamp on android has offline mode which I find almost essential.

Does Jellyfin do smart playlists yet?

Edit: There seems to be a plugin. So, now it's just about the fact that I already have it set up the way I want, and that I don't wanna put all my eggs in the same basket. But I guess using Jellyfin for music is totally viable now.

i wish i could help. i got the privilege of having a friend who took the headache off me and just set everything up properly before i even got my server ready lol

we haven´t encountered this issue, so all i can say is: it´s solvabe. sorry

Something like picard to fix the metadata for you?

i understand what you mean. there´s bad phone reception in my area and streaming is a horrible experience, i download everything on my phone. if i have a stable wifi connection i can stream easily. the benefit of it is just not bloating my 128gb phone to it´s limits

And sharing my libraries with other friends sharing back with me is pretty great.

This feature is imo THE killer feature of Plex, although I use Jellyfin. There's no sharing of libraries like Plex does. Multiple user accounts per server, yes, but you have to switch between servers and search separately.

unfortunately i have no idea about the apple ecosystem. the ios app is smooth. i hope you can just download it and test it somehow on your apple tv.

jellyfin supports several user accounts for friends and family.