If you're working 80-100 hours/week, what are you maximizing apart from time spent "working"? Even if you're trying to maximize productivity (and I'm not sure

If you're working 80-100 hours/week, what are you maximizing apart from time spent "working"? Even if you're trying to maximize productivity (and I'm not sure that's the right thing in life to maximize), I bet 80+ work-weeks are supra-optimal.