Tried Jellyfin, but it doesn’t seem to have the capability to stream directly to my TV, it always wants to transcode it which strips away all the 4K and HDR niceties. While Plex would try its best to preserve the original stream and only transcode what the TV can’t support.
Also Plex’s clients are more polished, it actually feels like I’m browsing my own Netflix.
You can always turn off third party content in Plex (by unpinning them). I only use Plex locally so maybe that’s why I’ve been missing all the cloudy bloat lol.