> The research is clear: beyond ~40–50 hours per week, the marginal returns from additional work decrease rapidly and quickly become negative. If that is reall

> The research is clear: beyond ~40–50 hours per week, the marginal returns from additional work decrease rapidly and quickly become negative. If that is really true, what does it say about people who are working full-time _and_ trying to do a project on the side? Are all the people who successfully do that outliers? To have a successful side project do you need to spend less time doing actual work at work? Is there a ticking time-bomb once you start working on a side project (effectively entering a "crunch time"), where after a certain amount of time you're doomed to fail unless you take a break?