Nebulous
Legend
I haven't read through the thread, so I apologize if I'm repeating what someone has already said, but I think there's a disconnect with many people about the broad appeal of Greyhawk, which in my opinion is significantly less than the Forgotten Realms. Fans of Greyhawk tend to be older and grew up on Gygaxian D&D. This is not to say that I think WotC shouldn't offer a nice, perhaps even deluxe, commemorative hardcover or box set for Greyhawk, but I think they made the right decision, at least in terms of not making Greyhawk the default setting. The Realms simply has broader appeal, in my opinion.
I agree, the Realms has far broader appeal.