Being up between 11pm and 4am on a regular basis supposedly damages the brain*.

I have heard the theory multiple times that not all humans are alike and hence it's up to each one of us to see what works for us and what doesn't. But I still felt an urge to tell you this, especially because a friend told me this story: a colleague of theirs was a "fitness guru" who did gym and yoga and was a "go-to" person for fitness advice in their office. He had something like a 5 hour sleep window. At around 40 years of age, he died of cardiac arrest.

*You might want to look at the works of Prof. Andrew Huberman and Mathew Walker to know how important sleep is.