I wish all the reorganization I ever needed could
happen while I was asleep.
Bruce N:
Best conjecture, as I understand it, is that this is exactly when most of
it does happen.
Ask yourself what kind of reorganization can happen while you're asleep
(and not interacting with the outside world). And what kind _requires_
interacting with the outside world. Of course it's the same "kind" in
either case, but different things must get reorganized.