It's up to them how they sell their music, and then it's up to the consumer to decide if they want to buy it or not.
As long as it's not just a ploy to get consumers to buy an album just to get the 2 or 3 good tracks on it, I'm in favour of it.
I am seeing a number of sentiments like this. It's nice and romantic and all, and I can sure appreciate it: the creator's intent for the whole creation as a cohesive unit and all that... Wonder why people just don't see it with Apple hardware and OS? Apple hardware and Apple OS, made to go together; it would be a crime to split them up.
So, is it "up to them how they sell their creation"?, or does the consumer get to dictate the terms and rip the heart and soul out of the creation, simply because the consumer should be allowed to do anything he wants with anything he can purchase?
Having said that, the two situations are a little different -- songs in a set are on a par with each other; I may well want the whole set of something, but may be more inclined to build it up over time.
OTOH, Hardware and OS complement and complete each other; which is more like the album art and the songs (I can see a real case for keeping original album art with songs even when the medium goes digital). I wouldn't want to see Pink Floyd album art with Carla Bruni's music; and I wouldn't want to use Mac OS X on a Dell. It would work, to a point; but, yuck, just not right, somehow.