Playlist folders is an awesome feature. But often I'd like to have a linked copy of a playlist available multiple places.
Not just a copy of a playlists contents (you can easily do that already), but an identical linked copy of an existing playlist.
I have my playlists sorted by genre, artists and whatnot. This would be great to create a Playlist folder containing some playlists that you wanna shuffle right away, without messing the structure you have spend so much time on.