What Spotify has going for it is the social graph -- people trade playlists via Spotify, and if all your playlists and your friend's playlists are in Spotify, i

What Spotify has going for it is the social graph -- people trade playlists via Spotify, and if all your playlists and your friend's playlists are in Spotify, it makes it harder to switch because of cost or Taylor Swift. It also has probably the most omnipresent music app (although annoyingly no app for Xbox One).