For us, every time we skipped/rewind/fast forward the audio and/or subtitles would stop syncing correctly. This was the primary killer for us. Another issue was the lack of native apps. We have a Samsung TV that has a Plex app so it streams Plex without needing a separate device, while jellyfin had to be controlled directly at the server computer to do the same, like we couldnt select a new episode or move etc. Without walking back to the computer. Those two problems are really what made us go with Plex instead.