Not sure about jellyfin, but I really dig Emby. Just as convenient as Plex. I can't even remember why I switched to Emby over Plex, but I never looked back.
Emby performs better than Jellyfin IME, at least if you need it to work on older TVs. Though IDK if they still offer a lifetime (pay once) subscription.
I think the final straw was Plex artificially blocking transcoding on Raspberry PI, even though it would work with a ton of work arounds.