They’re not just closed source, they started as the open source project response to Plex. It was promised that they would be open source forever. They lied, slammed the source door shut a few years later and pivoted to a paywall.

There was no discussion with the community or contributors, no alternatives explored, no surveys or polls.

Just a “Sorry we’re going closed source” blog post, Jellyfin was forked from them in vengeance.