Agreed 100%

"And I’d keep building whatever is next behind the scenes. And hope to milk those Facebook profits for as long as humanly possible."

They're already doing it. VR, AI, blockchain are all the future, and Facebook is serious about all three. Let's admit it, social is a tough space to navigate, but Facebook as a tech co is being executed exceptionally well. Kudos Zuck on that. And as for social, communities (Facebook Groups) will be the sticky -but not so profitable- part of that business.