I am a chronic insomniac... basically have been since birth. On average I probably get around 4hrs/night. I suppose the good thing is I never really tired from sleep deprivation aside from the occasional nights that I don’t sleep at all. My mom is a doctor, so growing up she made my doctors try every medication from A-Z to get me to sleep like a normal person. They all either didn’t work, left me incredibly hung over, or would make me sleep for like 16 hours. Eventually one of doctors said “maybe you just don’t require 8hrs of sleep”... something I had intuitively known for years. I suppose we’re all wired differently. Interestingly one of my grandfathers was the same way. I suppose the benefit of only sleeping 4hrs a night is that I’m that much more productive in life.