I've been using Jellyfin since the beginning and it's been a total joy to use. Even though I trust the project now, in the beginning when I was migrating off of Plex I had both running simultaneously in separate VMs referencing the same read-only library. This dual config worked great, though I didn't use Plex much at all after Jellyfin quickly proved itself even in the early days of its development.
The diverse client support is awesome. In addition to streaming video content to various house devices, my favorite is my "jukebox" music listening setup consisting of a RPi 3B+ with ALLO Piano 2.1 DAC hat feeding separate speaker and subwoofer amps with desired crossover frequency. Running on the Pi is Mopidy with the Mopidy-Jellyfin extension to access Jellyfin's libraries along with the Mopidy-mowecl extension which provides a slick web front end for the DAC (you can also queue music from the Jellyfin GUI and "play to" the DAC). Highly configurable and fun to tinker with. For example, I have a USB numberpad keyboard plugged into the Pi with assigned hotkeys by way of the triggerhappy service. I love being able to keep the music playing if my desktop workstation is off or rebooting.
The diverse client support is awesome. In addition to streaming video content to various house devices, my favorite is my "jukebox" music listening setup consisting of a RPi 3B+ with ALLO Piano 2.1 DAC hat feeding separate speaker and subwoofer amps with desired crossover frequency. Running on the Pi is Mopidy with the Mopidy-Jellyfin extension to access Jellyfin's libraries along with the Mopidy-mowecl extension which provides a slick web front end for the DAC (you can also queue music from the Jellyfin GUI and "play to" the DAC). Highly configurable and fun to tinker with. For example, I have a USB numberpad keyboard plugged into the Pi with assigned hotkeys by way of the triggerhappy service. I love being able to keep the music playing if my desktop workstation is off or rebooting.
https://github.com/jellyfin/mopidy-jellyfin https://github.com/sapristi/mopidy-mowecl
The best thing is it's all FLOSS, so I don't have to worry about the rug being pulled out from under me!