Yes, I use my server from outside my home quite often and don't always have wifi fast enough for 4k movies, so I have plex break it down to my bandwidth. Works like a charm. Jellyfin just refuses to work.
I added quite a bit more already in other comments. I noticed they were still acting like their bad experiences with Jellyfin were universal, and that was all I had left.
Ah, my use case right now is almost exclusively streaming stuff from my laptop to a phone with HEVC support over a local network so I can just turn transcoding off and be okay.
I did however have issues with my lack of transcoding (I turned it off myself, not Jellyfin's fault. Pitchforks down, people) on a tablet without hardware HEVC support though so I may have to experiment with it soon.
FWIW I had to go in and turn the feature off but there's also a good chance it was using CPU instead of GPU