I take a stimulant for my adhd. If i didn't have physical exhaustion (usually a 10km 2h walk before sleep) I don't think I could sleep at all. It still affects the quality of sleep (not much deep sleep) though.

Now, sleep quality really affects everything. I think in general, mental health/sanity is hardly taken seriously in the tech industry. If I had employees I'd rather they had enough physical activity and sleep over a long and sustainable period than them sleeping under their desk hacking through the night.