I notice this in software engineering, too. Challenging problems drain brainpower quicker. I was working on difficult SOTA stuff for the last few months, half

I notice this in software engineering, too. Challenging problems drain brainpower quicker. I was working on difficult SOTA stuff for the last few months, half of it was reading articles and half was implementing them in software. I’d crash by 3.30-4 pm every day unless I had an extra meal around then. Lost 5 kilos, too. So it wasn’t all going into my waistline. You can observe this, I think. Drivers too tend to make more mistakes if they don’t eat well on long drives.