Why not? There are three Frank Ocean tracks on one shared playlist and I'm just bursting to tell everybody how this reminds me of Usher circa spring of 2004 when he had three concurrent singles out, "Yeah!" "Burn" and "Confessions (Part II)". Dorky, I know---but Spotify could build in way more community functions for connection between users if they wanted to take the app to the next direction.
Update: This idea has been suggested again here:
This idea has been submitted more than one year ago but unfortunately hasn’t gained enough kudos during that time (25 kudos/year). In order to keep an overview of the active
ideas in this forum, this idea will be closed for now. Note that this does not mean the idea has been declined by Spotify.
Please feel free to re-post this idea if you still feel you want this implemented. With a little change in presentation, maybe this time it will gain the necessary support from the