> And I very much doubt they are producing enough. They're almost certainly not. The popsci figure for how much a human can concentrate during a day is six ho

> And I very much doubt they are producing enough. They're almost certainly not. The popsci figure for how much a human can concentrate during a day is six hours. A standard 5-day 40-hour workweek already consumes that and more. I can virtually guarantee you that people working more than a single (knowledge work) job are significantly shortchanging one or both of their employers.