China has a vast vast oversupply of software engineers.
In order to make 996 work in the US, there would need to be a pretty big oversupply of talent (and a lower standard of living) to make people desperate enough to give up their entire lives to their work. Unfortunately, I think we may be getting close to that about now or at least heading down that path.
What makes you think that there is an oversupply of (good) Software Engineers? All I see every day is that it's still pretty difficult to hire good people.
In order to make 996 work in the US, there would need to be a pretty big oversupply of talent (and a lower standard of living) to make people desperate enough to give up their entire lives to their work. Unfortunately, I think we may be getting close to that about now or at least heading down that path.