I once stayed at work really late, and I was surprised to see my boss still there. I asked him how long he typically stayed, and he told me till 7 PM or so. H

I once stayed at work really late, and I was surprised to see my boss still there. I asked him how long he typically stayed, and he told me till 7 PM or so. He was there at 9 AM every day, so I started thinking, how does this guy work for 10 hours a day without burning out? Then I paid more attention to what he was doing. It was mostly answering emails, talking to someone on the phone, talking to someone on Zoom, meeting somebody for lunch... it's easy to do that all day long if you have the personality for it. It's much harder to spend 10 hours a day doing programming, because your brain will start getting tired and you'll start making mistakes. Then you have to start debugging, which is even more mentally taxing... and eventually you just run out of gas until the next day.