Why not implement social aspects to this wonderful music player? Spotify has merely turned into a player and nothing else after taking away direct messages and learning what tracks are being listened to in your network. I feel like without social functions that keep members from staying, there is absolute no reason why another competitor can easily take over the general population and Spotify will be forgotten. Why can't you link two members' music to find similar tastes? Why can't playlists be co-hosted? Why can't you equally play to one output with two members? I feel there is a remarkable amount of potential for Spotify as why I am a stock contributor, but it's remarkable to me to see no real change in it's functions other than UI? Why even connect to Facebook if there is no real encouragement to follow your friends? There really is some potential here. Don't lose it while you have it.
Updated on 2019-06-11
Spotify used to have the functionality you describe, which is no longer present. The discussion regarding this is located here:
Any update on the matter should be posted there.