Yup, also, as someone who's done sustained 60+ (maybe even a month of 80+), there's very little room for creativity. It works ok for pursuing the solution to t

Yup, also, as someone who's done sustained 60+ (maybe even a month of 80+), there's very little room for creativity. It works ok for pursuing the solution to that one clear, looming problem. I much prefer 5hrs/day of focus, arriving at the office refreshed, excited, and creative.