Quote Originally Posted by Azerian Kelimon View Post
Oh, yes, of course. Because those are the most common campaigns ever.

Really, cut the nitpicking. You just look foolish by presenting minor, hypothetical, one-time-ever-in-history cases.
*shrug*

I know that I have homebrew worlds that can not be updated to 4e, they just won't work (that being what happens when the rules of the universe change). Running an interplanetary empire that uses magic items to provide most of its food doesn't transfer so well.