I keep a Jellyfin instance running as a hedge. Here's the thing with Plex (and actually a lot of companies set up similarly): those "lifetime" memberships are a trap. Think about it: Plex gets your money ONCE but they have ongoing expenses. Sooner or later, they'll have spent every single cent made by a lifetime membership unless they either get more folks OR squeeze everyone a bit more.
Once they started adding their own shows and making strange UI decisions, I could sense the end was coming. A move like this brings it up fast. Jellyfin is not nearly as good as Plex in a lot of ways, but it's really Open Source.
Anyway, a lot of rambling, but in short: when there is a "lifetime" subscription, watch out!