Spotify has playlist folders on desktop.
You can play a playlist folder on desktop.
Playlist folders are visible on mobile, but cannot be played.
You cannot share a playlist folder for others to view.
So, this automates the creation of mega-playlists based on all playlists starting with an emoji.
(It also keeps playlists in sync if all their tracks are from a single album.)
Pseudo-playlist-folders through emoji.