"but you can't run a startup at crunch time with devs putting in 7.5 hour days" You can at 8 hours a day / 40 hours / week. The only reason more hours would be

"but you can't run a startup at crunch time with devs putting in 7.5 hour days" You can at 8 hours a day / 40 hours / week. The only reason more hours would be required from engineering is bad management that has unrealistic expectations. So what if it takes an extra week to develop the product? It won't matter. You can most certainly run any company with with a 40 hour workweek. If you have evidence to the contrary, please provide it. An eight hour workday may not be a universal human right, but it is well understood to be the standard workday. Any deviation from this like the ten hour days you describe should be stated up front by the employer.