Spotify hit the mainstrean. Suddenly everyone was aware they could access millions of tracks, on demand. CDs and even MP3s became old-hat overnight.
Umpteen rivals have since appeared (Rdio, Aupeo!, Pure Music, Qobuz), but until recently Tidal had the best shot at wrenching the spotlight from Spotify, promising higher-quality streaming, editorial curation, and Taylor Swift.
Now Apple has entered the fray, with a human touch, a new radio station and an embedded social network. And also Taylor Swift.
Which one will make your ears do a happy dance?