Just putting it out there that Plexamp absolutely needs collaborative playlists. Ive been using Plexamp myself as my main music app for a year now, but trying to get my partner to join we realized that we can’t create playlists together like we used to on Spotify. I can add her to my playlists through the web UI, but she can’t add any songs to it.
The behavior should be the same as pretty much every other music app: If two users have access to the same libraries, they can collaborate on playlists together, where anyone who is added to the playlist has the option to add or remove tracks available from the library