[Noseshine]

This isn't an absolute. Of course you can do "sprints" successfully. You just can't do it for very long. And we don't know and never will if one or the other problem they had might not have been prevented if the guy designing or making the part had had enough sleep - so it's always a discussion with insufficient data. After all, we've had enough research to show that a lack of sleep impacts the brain, from psychological studies to neuroscience, which now tells us that the brain is actually cleared of toxins during sleep. For the cases who still get enough sleep, well, not sure how the lack of "a live (outside work)" impacts various factors short and long term.

For my coding work I have stopped doing certain kinds of coding after evening, basically, anything that isn't "mechanic" but requires design decisions. Even if it's "urgent". Executing what I had decided earlier is okay, but decision making just doesn't work as well for me that late in the day, even if I still feel great. The next morning always seems to bring a fresh perspective.