My first thought was remembering when I could store my (MY!) music online to access it anywhere and share it with…
I remember how disappointed I was when it died due to pressure from Big Money and not enough users. And how long it took to download all the stuff I had gotten from other users (6 Gb of Christmas songs mainly).
I rarely used it myself since I didn’t (and don’t now) access stuff from the Cloud (easier, faster, etc from my own PC(s). And none of my friends were that interested in my Playlists.
It’s still just not a good business model.