Australia is sort of like this, smart students do vector calculus in their last year of high school, and really smart ones do the attached shit I can't comprehend.
By comparison what I hear about the U.S structure is a travesty.
https://cawfee.club/media/0061902940bb6f3b9997bc7c8e4d67dc5dd75d4969bd5f4414be828ee517baaa.pdf