> Musk said while "80 is pretty sustainable," the increase in suffering when you work more than that is dramatic. "The pain level for hours increases exponentia

> Musk said while "80 is pretty sustainable," the increase in suffering when you work more than that is dramatic. "The pain level for hours increases exponentially. It's like nonlinear above 80," Musk said Sounds about right. Below 80 you can still set aside a few hours or maybe most of day on the weekend for yourself. Above 80 starts to get interesting. Weekends are no long yours and days bleed into each other.