Plex is definitely more user friendly. I would like to try Jellyfin again but I host Plex for my parents back home and I don’t want to troubleshoot Jellyfin internationally when I know they can just install Plex and log in on their devices and I don’t have to deal with it.
Definitely different strokes for different folks but I understand Lemmy is very big on FOSS so it’s no surprise Jellyfin has such a positive following here.