I have a lifetime Plex pass.
I tried out Jellyfin last month.
Now Plex is uninstalled.
Even if we ignore the differences when it comes to matters of FOSS, cost, corporate control, privacy, etc, Jellyfin’s performance is just so much better.
Setting it up to run over https while fully self-hosted was a learning process for somebody who isn’t a web dev, but holy crap was it worth it.