I agree with you. There's only so long that you can operate at that level. However, the main point of how much can be done when truly focused is not lost. What

I agree with you. There's only so long that you can operate at that level. However, the main point of how much can be done when truly focused is not lost. What if you did two days each week like this? I think that's sustainable, and you could get '4 weekends' in each month.