the world sure as hell isn't telling him not to come back. my guess is, it's too much to live up to and he's just like "fuck it"...and the longer he waits the harder it would be for him to come back. thing is he wouldn't be able to just come back and do one special...he'd have to work on it for so long that it's probably just too much to deal with...or maybe he genuinely doesn't want to anymore...i guess we'll never know.