When he went to go work on VR at Facebook?
He's still there though, right?
edit: he is not still
edit: he is still a consulting CTO
* Many believe Occulus isn't succeeding fast enough, and so the years Carmack spent on Occulus/Metaverse could have been spent on any number of interesting projects. Although I'm sure the money was amazing and I can't object to him taking it.
* If Occulus/Metaverse succeeds it will be a ultra-monetized environment (re: Farmville) and encourage a huge amount of consumer-hostile policies like unlimited tracking (since Facebook owns the hardware now). No gamer wants that. The whales who will be justifying its existence won't benefit from that.