It's especially horrible if you have lots of playlists, and like to add playlists from Apple Music to your library. You can't add Apple Music playlists to play

It's especially horrible if you have lots of playlists, and like to add playlists from Apple Music to your library. You can't add Apple Music playlists to playlist folders, and playlists can only be sorted alphabetically. On the Mac, your playlist folders are on top; then Apple Music playlists & your playlists are mixed together. On iPhone, it's reversed; Apple Music playlists, then your folders, forcing you to scroll all the way down to get to your playlists. And on Mac you can't add a song to a new playlist in a playlist folder directly; you need to add a song to a new playlist, and drag that playlist (that isn't highlighted) all the way up to the right folder. Yuck.