Yahoo alienates customers
Have you bought DRM-infected music from Yahoo's Music Store?
Too bad.
You won't be able to move them to other devices or computers after September 30th, when Yahoo switches off its license servers.
Sure, you can burn them to CD, and re-rip them, but you will take another significant quality hit when they are re-encoded to MP3.
Microsoft tried a similar move earlier, but public outcry caused them to keep the servers going until 2010.