Human experience varies way, way too much for there to be a definite answer to this. There are billions of people, and a 100% chance that some people work bette

Human experience varies way, way too much for there to be a definite answer to this. There are billions of people, and a 100% chance that some people work better with longer hours. Some people love work more than having a family and will happily go without one or get divorced to stay longer at the office. Some people wind up committing suicide because of how oppressive their work is. Some people just naturally have more energy, some less. At the end of the day, research on the general population can really only give us a good baseline default. It won't be perfect for everyone, but actual, tangible research has shown that on average, less hours at work makes things more productive. That should be our default. When (not if) an individual who isn't compatible with the default comes along, we should just make them not work on the default.