EVERY exact science, Medical, engineering, high maths/physics have been metric IN THE U.S.A. for a century.
I'm 62, it changed in Canada when my kids were in school, so roughly the 80s.
Oddly enough the argument for the change was "Americas gonna do it so we should" yet Americas still old manning this one to the ground.
P.S. I still do recipes and all in imperial, old dog y'know. It helps that my recipe sources are older. When I want to know a public figures height I take the 1. 77 or whatever, copy it, go to google and paste it and the "in feet and inches" pops up in options automatically.
Your current president is shorter than Bill Clinton, Barack Obama and Justin Trudeau who are all 6 foot 1 inch. Weird eh, since he n all the other liars claim he's 6.3