This brings back memories of my experiments with “polyphasic sleep”. What they don’t tell you about is the profoundly demoralizing effect of sleep deprivation. I didn’t just feel crappy; I felt sad.
I also recall falling asleep standing up, and waking up as my face smacked into a cupboard. Fun times!
Getting too little sleep can have serious health consequences, including depression, weight gain, and heart disease. It is torture. I know.