Before the influx of "just use jellyfin" bros come in let me get ahead of it.
I ran Plex for a decade and loved it, had the subscription, was happy to pay for software I found value in. This however was the kicker, not because it i was directly affected (not because I had a lifetime subscription), but it signaled the end of Plex that I knew from before.
So I did switch. It was not easy or painless like people here claim. Metadata is stored in different ways that made conversion difficult. I tried multiple conversion tools and none of them worked for me, or left my library in a half state. I ended up just staring from scratch, and it was a couple of months before I was happy with it.
That being said, I think it's worth it. It's pretty much at feature parity, but mostly because Plex hasn't been doing anything for server owners while jellyfin devs have been for years now. I'm happier with jellyfin than I was with Plex.
So, to the "I use jellyfin LOL" guys here, no that's not helpful, and it's condescending. It pushes people away, but I have a weird feeling they want to push people away (and honestly if that's your only comment it's the same energy as crypto bros).
Instead, I empathize with Plex hosters, I was there, it's not a fun place to be anymore, and I am here to say that yes you can switch, no it's not as easy as Plex, but I personally think it's worth the effort. With all open source things the user interface and experience is definitely lacking, but if you're willing to put in the time it will be worth it.