Playlist of playlists

[jeffmcfly]

I'd like to be able to include playlists in other playlists.

For example, I've created a playlist for each country I've visited (e.g. #bali, #mexico, ...) and I'd like to be able to group them all together and play all the tracks together in one big #travel playlist.

#travel 

> #bali

> #mexico

> …

Note that the playlist group is not just an organizational folder, since we need to be able to read the entire family of playlists.

Another examples:

#rock
> #90s rock
> #80s rock

> …

#rock

> #grunge

> #metal

> …

#blindtest

> #pop rock

> #movie

> …

[Malos318]

Great idea, managing a large amount of playlists with varying degrees of specificity is super tedious right now.
This would really enhance the experience for me.