[chwahoo]

> there is no reason to not own your own collection

There are reasons. The-all-you-can-eat model certainly makes much more music available, which is better for discovering new music. Also, if you regularly listen to a lot of new/different music, Spotify/Rdio/etc would be cheaper than iTunes/Amazon mp3.

Personally, I'm in a kind of "stuck" position where I'm trying to decide whether I should continue to buy music from Amazon, or should switch to an all-you-can-eat streaming service.