"The truth is that much of the extra effort these entrepreneurs and their employees are putting in is pointless anyway. Working beyond 56 hours in a week adds little productivity, according to a 2014 report by the Stanford economist John Pencavel. But the point may be less about productivity than about demonstrating commitment and team spirit."

My main disagreement with this type of quote is how do you account for R&D? You have to try things out, not all of them work out, you throw things away, things don't work out as expected. If you're in a true startup, money is tight, deadlines are agressive, you have to put in the time.

These types of statements discredit the "do or die" moments on which companies are built on.