I am talking solely about the server side, not the player side.
Obviously a good functioning player will not need hw accellerated transcoding or hdr conversion. But sometimes that’s simply neither possible or feasable. Some hardware simply cannot properly transcode all formats, or don’t allow for installation of a player that can do that. Sometimes i watch a movie on my laptop while being connected to my phone mobile hotspot and using wireguard to phone home, i don’t want to direct stream a full movie in hdr and 1080p 40mbit/s… i want the server to transcode it properly.
So to conclude - i am talking about serverside, not playerside - stop assuming the person you are talking with doesn’t know what they do simply because you think you know better.
Also i find that the speed of scanning, getting metadata, accuracy of linking metadata and files, the whole music section is lacking on jellyfin comparing to Plex
Still I prefer jellyfin as its free and open source and it does what I want it to do. But in my experience Plex did all of this way better, faster, more accurately and reliable… And jellyfin music category is outright unusable compared to plex