I’ve known two people that sleep very little. One was a guy from google that managed a team and also taught and did other stuff.

I was doing the math and it didn’t make sense so I asked him about it and he said that he only slept 5 hours a day and it’s stressful on his family life, and that his dr keeps telling him it’s not healthy.

The other person was someone that ran the company I worked for. I could tell by the remote access logs that he was going inactive around 2am and then would be back on by 6am. It didn’t seem possible and as a security concern I talked to him about it. He said that he barely sleeps. I verified it by talking to his assistants.

Both of these people were extremely successful in their careers. I think it’s some sort of OCD that they’ve harnessed.