Something about this bothers me. Time-keeping is already not straightforward for an engineer. Because the work is done in our heads and doesn't necessarily stop just because the workday is over. You don't have to be sitting at a keyboard for your head to be grinding on a problem. More often some problem takes hold of you, occupying some mental bandwidth even while you're away, at home trying to enjoy time with your f…
In addition to that, I'm frankly not sure that a 10 hour/week (2 hour/day) savings is going to be worth a 25% pay cut to most people. I'm not saying two hours per day (or an extra weekday or whatever) is entirely trivial, just that one has to be very fastidious and organised to take advantage of it. Even so, the economics of human task-switching and overhead, particularly in high cognitive load professions like softw…
I did a 4 * 10 job one summer when I was a teen. It was REALLY nice to have Friday as "recovery" day before the real weekend started.
I'm not sure how my family would tolerate me being gone 4 * 10, though.