My friends don't have it set up. Some of them are friends of friends, and people I don't talk to regularly. I'm not going to try and convert them. It's also a bit more complicated via tailscale or VPN reverse proxies and Plex "just werks". If there's anything beyond just installing an app and clicking an invite, a bunch of people who use my library are going to have a hard time. Like my dad, he's pushing 70. My friends would also have to do the goofy networking setup for it to work for me.

I'm also not even sure if people I share with have means of installing. My one friend who uses my library a lot does it through a Samsung TV. That involves sideloading the app to install jellyfin.

Lastly, like I said, music. Plexamp is one of my #1 used apps. There's a lot that goes into that beyond just being able to play media. It curates playlists depending on what you just listened to or gives you similar artists, similar to how Spotify makes a "radio" after playing something.