996 - it's a global marketplace of talent and very few in America are willing to work 996. If you are, you either are the founder type or young and unshackled.
This is my experience as well. For a lot of these people, it's performative. Just kind of existing at work for 12 hours is "getting work done" to them, despite the fact it's life destroying for pretty much everyone that has an actual life to live.
Labor laws in California make infeasible (for good reason). The kinds of jobs going into 996 won't pay enough for exempt status, so that's 32 hours of overtime a week.