* Accelerated TV support - Jellyfin sometimes struggles to play media that plex has no problem with. This is across an old Apple TV and an oldish LG tv.

* general Tv support - no Jellyfin app on Samsung TVs (at least older ones)

* General challenges to get things to start - it never worked for me out-of-the-box

* slightly weird sign in flows because it’s all self-hosted (have to first install a mobile app to make signing in on TV app smoother unless you happen to have your computer and TV side by side)

* weird issues with things suddenly stopping to work: DLNA was working but without any changes I can think of on my end it no longer works

* weird dlna support - at least with iOS VLC it didn’t work smoothly - like VLC sometimes wouldn’t see the announcement or something and I’d have to reset. Could be a VLC issue but don’t recall similar problems with Plex

So basically Plex is a smoother, easier to use experience that typically “just works” without issues.