The book "Lifecycle Investing," by Yale professors Nalebuff and Ayres, argues that a young person ought to invest 100% or even more (via leverage) in stocks. (More specifically, a young person with high future earning potential, which probably includes many people here with a career in tech.)
I'm fairly risk averse and don't totally believe their leverage calculations. But it did convince me that any non-negligible bond allocation is probably suboptimal.