I sometimes question the use of Jellyfin as streaming replacement. It only makes sense, if you have a huge DVD/BD collection you do not want to put into a dedicated player or if you pirate everything.
For music it makes more sense, because smartphones are great music players at home and on the road (and I love buying CDs).
I got a Synology NAS for my children’s photos and wanted my music to be available in our LAN as well. Jellyfin looked good and is open source so I gave it a try. I am very happy with Finamp as a mobile app to play and sync my library.