My tech-illiterate mom uses my Jellyfin instance with no issues. I sent her a link to the app store, her credentials, my server’s hostname and that was it. And once it’s set up, Jellyfin is much more straightforward to use than Plex.

Sure Jellyfin has issues and doesn’t support as many types of devices, but Plex is far from perfect. I use it like twice a year, and the UI gets more and more confusing with each update IMO.