I think shaw is having fun here. Even quoting Elon.
It's funny to see people on the TL calling it a mental breakdown when in reality it's really the opposite. 
Shaw just needed to say his piece before turning the page. This sounds more like a "ok I'm off", I'm sick of all this toxic space which is CT.
Shaw will be heads down building now but I guess he needed to say f uck off to the haters first.
I hope this is the case and, if it is, it's really bullish for AI, really bullish for $ai16z and for most of your ai bags as well as builders like him can lift the whole space up.
CT has been terrible with shaw and I cant blame him for leaving.