[GiuseppaAcciaio]

I'm afraid that this suggestion is a bit glib and simplistic: there are people (my S.O. being one of them) who despite no alcohol, no artificial light after dinner and all doing "all the right things" still can't fall asleep before 2-3am, which then leads to 4- or 5-hour nights all week long. For them, catching up on the weekend is the only solution (albeit an imperfect one).

[modzu]

indeed many people are biologically wired to be "night owls"; it's a well established individual difference in the psychology literature:

https://www.ncbi.nlm.nih.gov/pubmed/10849238

[lm28469]

I think we all agree that these people are the exception to the rule. Just like Elon Musk isn't your typical CEO or Terry A. Davis isn't your typical developer.

[wafflesraccoon]

Rest in peace Terry Davis, the world wasn't ready for TempleOS.

[AtlasBarfed]

Are they exercising?

You need activity/exercise for good sleep.

[GiuseppaAcciaio]

Yes they are (2x as much as me), and no you don't.