I maintain a Jellyfin instance for audio that points at the same music library as my Navidrome instance does just so I can use the Jellyfin client for Android TV. I would absolutely LOVE to have a subsonic-compatible Android-TV-focused app, so I could finally single-source my music. It’s just not friendly to guests to have them have to log in somewhere using their own device to my music server and then have to cast to my main entertainment system at home, when Android TV is just sitting there, acting as nothing more than an old-school Chromecast.
So, don’t get me wrong, Jellyfin is THE BEST video server software FOSS or not, IMO :)