I switched to Jellyfin from Plex about 6 months ago. Both have worked very well for me. Nice part about using Jellyfin over Plex is not having to sign up for a Plex account.
Discussion
Finally figured out Plex. Took a good hour of troubleshooting.
Overall, which do you like better?
Jellyfin for the most part. Plex always felt like it was trying to upsell me from the free version. I’ve run to 1 noticeable bug with Jellyfin that I just work around. With Jellyfin it’s great that I can create an account for someone else in my family without them doing a signup process.