I doubt most people can maintain productive focus for 12h every day more than a few consecutive weeks. They may at the beginning but fatigue sets in and by the

I doubt most people can maintain productive focus for 12h every day more than a few consecutive weeks. They may at the beginning but fatigue sets in and by the end they are less productive than after a good 8h day. I’ve seen it in others, I went through it myself. Perhaps in some fields it’s different but I doubt it. Even playing games 12h every day means you start making more and more mistakes than a fresh gamer. I’d say normal work will be even more tiring and stressful given the higher stakes. Especially for a knowledge worker.