I left Plex for Jellyfin + Infuse a couple of years ago, and I'm not looking back.

But the sore point right now is outside access, which Jellyfin really isn't made for. I set up Tailscale so I can connect Infuse to Jellyfin remotely. But that's not exactly as smooth as Plex. I can't give friends and family access, either, which was dead easy with Plex.

In terms of the UX, Infuse isn't very good, but it does the job okay. The built-in subtitle fetcher is amazing; that stuff never worked for me with Plex.