Why aren't playlist folders supported?

This has been a missing feature for a long time and relatively easy to add. It would make a huge difference in djay pro (Mac). Why haven’t the playlist folders functionality been added yet? For someone who has a vast amount of playlists organization is key. Why keep passing this up?

Spotify Playlist Folders

Playlist folders in iTunes are supported. Playlist folders on your hard drive are supported.

What are you asking for?

I changed this topic to an idea. Thank you for sharing, Alex!