Nested Playlists

As a DJ and rekordbox user, I want to nest playlists, in order to compose playlists from smaller playlists. This gives me the ability to prepare sets on a more abstract level (e.g. mood based) than putting together playlists track by track.

Furthermore when I improve/optimize a small playlist, any composed playlist that uses this small playlist will also reflect this change.

As my collection is approaching ~6500 tracks, keeping an overview of all my music (especially remembering which tracks go well with each other) becomes harder and harder. Being able to use other playlists as building blocks for other playlists allows me to reuse sequences that sound great to compose/prepare new sets.