[cacophony]

i don't think it's going to be particularly informative. it will illustrate what we already know, that superfans want to own every incarnation of a release, and that casual listeners just want to listen to it, regardless of format, and don't need to own a physical copy for the sake of owning a physical copy.

oh, and also there are luddites out there who won't get on the MP3 train, no matter how cheap the fare is.