I keep Plex as a backup because some client devices are really tetchy about interacting with Jellyfin. Not every smart device supports the Jellyfin app (nor VLC), and if they do have a built-in media player it’s typically one that uses filesize-based progress tracking, i.e. you wind up being unable to fast-forward or rewind the video (or sometimes unable to even pause). Generally every major brand of smart device has a version of the Plex app, for better or worse.
I keep Plex as a backup because some client devices are really tetchy about interacting with Jellyfin. Not every smart device supports the Jellyfin app (nor VLC), and if they do have a built-in media player it’s typically one that uses filesize-based progress tracking, i.e. you wind up being unable to fast-forward or rewind the video (or sometimes unable to even pause). Generally every major brand of smart device has a version of the Plex app, for better or worse.