I have historically collected and owned my own music. That said, I have really enjoyed streaming music with Rdio, especially on my iPhone. The only downside I

I have historically collected and owned my own music. That said, I have really enjoyed streaming music with Rdio, especially on my iPhone. The only downside I have observed is that songs come into and leave Rdio's library constantly due to licensing. It is not unusual to bring up a playlist and find that a song or two on it is no longer available. (Sadly, there is no mandatory licensing scheme for streaming services like there is for radio.)