Noah Smith on how Silicon Valley got boring, and why its entire corporate era died in a single month: "The movie The Social Network was the Liar's Poker for the social mobile tech generation. East Coast people saying, you can make all this money in tech and you still won't be happy, and everyone from the East Coast is like, wait, no. Yes, yes, I will." "Then tech got really boring because i-bankers from the East Coast are boring. Big tech is boring. Knowing what level you are at Google is…