> For someone with no responsibilities except work, 70 hour weeks are sustainable (did it for 3 years, not to be recommended, but no burnout.) Folks in the mil

> For someone with no responsibilities except work, 70 hour weeks are sustainable (did it for 3 years, not to be recommended, but no burnout.) Folks in the military do 84-hour work weeks when deployed (twelve on/twelve off — and really, with 30-60 minutes of handover time factored in it works out to 91-98 hours/week), and are deployed for up to a year. It's brutal, but it is sustainable. Having no other responsibilities to think of probably helps; I've no idea how distracting modern communications technology is to folks with families.