PS, Yes I think they contributed to the boom. I think that alot of techies/engineers fit the stereotypes having grown up modestly, working hard and being pretty introverted. Many suddenly found themselves with low six figures incomes, thought that was a lot of money, got seduced by it and thought that they would always make that much money and more. Its all emotions at play.
I dont think that is alot of money to live well and save. They bought homes stretching themselves while not allowing for downturns or periods of unemployment. Unless your household income is AT LEAST $200K and you ARE the boss, I don’t consider you as being a mover and shaker.