Read the Amazon MP3 update yesterday and came across the "scan and update your library" bit. I'm not really much of an Apple fan, but first thing I thought of when I read that bit was, "wait a sec, wasn't Apple doing this already?"
Anyhoo, I couldn't care less. Apple doesn't own the rights to be able to do that exclusively.
My issue is Amazon, with their most recent mp3 cloud service switch, is essentially doing a bait-and-switch, where unless you want to RE-UPLOAD your ENTIRE library, you must now pay $25/year to use their "new" music cloud service. You can maintain your previous cloud storage where you do not get to have "updated" music files from amazon's library if the song matches your library, but then you have to go through the arduous process of re-uploading all of your songs again...
Heard that the most recent Amazon MP3 app updates for android and iOS are essentially "broken" unless you upgrade your cloud account (haven't tested it myself).
I liked Amazon's music cloud storage up until I heard about this change.
I don't understand why I need to re-upload my library if I don't want to take advantage of Amazon's new (paid) cloud features...