[Emma_Goldman]

I think part of the issue is that there's a wide distribution of sleeping sensitivity. I'm a very light sleeper, and I find that a bad night sleep can ruin an entire day of work. Which is partly because I write for a living, which I really can't do well when I'm groggy. But for how many people are those two things true? I don't think many. A lot of people aren't light sleepers, and a lot of light sleepers aren't fazed by a bad night of sleep.

[tekknik]

I used to sleep under the number 3 wire on a carrier. Good luck waking me up with an exhaust.

[Emma_Goldman]

Seems like a superpower to me. Light sleeping was probably great 50,000 years ago, when other human tribes might raid you in the night, and when big cats might be lurking in the darkness. Back then, heavy sleepers were effectively free-riders: the light sleepers would act as an alarm for the whole tribe. But, today, it's a fairly serious maladaption.