I think it's important that these long hours are the exception and not the rule. You do hit a burnout point eventually and this can be devastating for a start-u

I think it's important that these long hours are the exception and not the rule. You do hit a burnout point eventually and this can be devastating for a start-up where you need your best and brightest being exactly that and coming up with new and better solutions to existing problems that will help put you ahead of the current and future competition.