This was a masterclass in so many different ways. Product development, business management, stack, system design and  infrastructure. Way better than all those "string theories" guys. Lex asked my questions very well and Kevin answered them really well. This guy leading facebook I would " handle him all my data". Really humble and smart.,(reply>), Yeah, agreed. More pragmatic grounded content based off of an actual proof of work. The cosmic dust stuff can be fascinating but this is the real valuable insight that's applicable.