I think someone also did the math and figured out that having fewer handoffs side a patient led to better outcomes so now there’s pressure to have two doctors per24 hours instead of three or four.
That's a very good point. I think 12 hour shifts aren't necessarily bad, but even EMTs/firefighters (in some places, afaik) have downtime after their shift. Maybe work one on one off, or maybe 2 on 3 off. I suspect that's still much better than the practice of 24 hour shifts.
Did they really study how doctors and other staff work in enough countries?