I couldn’t be happier having made the move off of plex to jellyfin a couple years back. Plex is basically dead to me since they made their move into enshittification. Jellyfin is perfect! Works great never crashes etc.
The only thing with jellyfin is the constant subtitle issues for years that are very difficult to resolve I guess and inconsistent across different apps. That and sorting of non movie/show content and not respecting folder view.
As the others said below, a while back (several years at this point I think?) they decided that instead of improving their core product, they were going to move the entire business model into a really shitty version of free streaming apps. Like the ones that come preloaded on "smart" tvs full of ads and tracking.
They had an extremely long laundry list of bugs and feature requests from LONG TIME users (like me) but decided to ignore them and instead completely destroy their apps with shit.
All the sudden you login to your plex app and it's FILLED with all sorts of content you have no idea where it came from - it's not on your server, etc...
Which is all just sad, because as time passes, they'll just die off and be looked at the same as any other free shitpile streaming app full of ads, instead of what they once were: a really good home media library manager.
From what I remember from the last time I opened it, they added streamed content with ads. That's the only thing that seemed weird to me. I think they started charging for streaming content outside of the house as well, but I only ever used it to stream from my PC to my TV.
I've been wanting to make the jump for awhile and I've used jellyfin as a secondary server on my library to test run it. I really enjoy it for a lot of reasons but need to properly figure out reverse proxy before I implement it as my main.