I'm highly skeptical concerning the claimed 'effects' of lack of sleep. I don't doubt those are correlated with lack of sleep, but for many of them, obvious confounding factors exist.

As a trivial example, overworked people typically get less sleep than average folks. And excessive work is also correlated with several of the 'effects' from the list, such as "fatigued and demotivated" and "lower libido". This means that even though lack of sleep is (indirectly) linked to those problems, getting more sleep won't necessarily fix them, because the real cause is something else.

I find it strange that a post explicitly addressed to HN readers fails to even mention this extremely obvious issue.