My guess is that it's a myth that developed from the industrial era when more widgets could be produced in 12 hours than 8. The fact that developers don't do sp

My guess is that it's a myth that developed from the industrial era when more widgets could be produced in 12 hours than 8. The fact that developers don't do specialized line work doesn't seem to register. As people are noting on this thread, startups are their own thing. During my startup days, we were always the next sale or funding round away from going belly up. We pulled late hours to get in the latest features for our president to "sell" to investors.