It's nice that Apple acknowledges that there is a genre called "Metal", but Black Sabbath is certainly not in it. They're Rock, maybe Hard Rock, but not Metal.
Oh I disagree fully. Metal is right where they belong.
Like the Beatles, by now people either have their catalog or they don't want it. I assume there will be purchases, but most older fans will have already ripped the CDs into iTunes. I certainly won't re-buy the iTunes versions but it is great to see them in the store.