I could have sworn folders worked with Android before, yet everywhere I go says that that isn't the case. I would love to put my playlists in folders, and when I do, they go into folders, but they are still kept outside the folder. It's basically like the playlists are duplicated, one inside the folder and one on the outside. I don't think Apple Music is ever going to fix it to allow the folder feature to work with Android phones, but it would be nice if it did again.