996 working is back in fashion. That means working from 9am to 9pm, 6 days a week. The concept originated in China, but AI startups in The U.S. had taken it up with a vengeance.
It is a stupid idea, conflating effort with results. You need a certain amount of effort to produce a result, but more effort does not translate linearly into more results. The science shows that productivity tapers off after 40 hours a week, and workers doing 70 hours so not produce more than workers doing 50 hours.
If you are working on your own startup or have another good reason, by all means put in some extra effort. But don’t sacrifice your health for someone else’s agenda.