The metric system is one of the dumbest things that foreigners make fun of Americans about, posting that map where it's only us and like Burma or someplace who are still officially on imperial units as if it makes us backwards and incapable of science.
But you realize that when we buy a box of graham crackers at the supermarket both units are printed on it, right? It says 12 oz (340g) on the box. The speedometer on our cars have markings for MPH and KmPH. Every schoolchild who has taken a science class knows how the metric system works. College-level (and beyond) science and engineering courses and all professional work in those fields will use metric in practice, etc. It's just in everyday things where we use imperial, I say I'm 6 feet tall, not 182 cm, we buy cheese by the pound and gas by the gallon. The criticism just comes from a place of pseudo-intellectual snobbery.
Another thing, people get worked up over how Celsius is supposedly better because it hinges on the freezing point and boiling point of water as 0 and 100, but for actually trying to figure out the weather outside, Fahrenheit is just easier because there are decimal benchmarks. 70 is nice, 80 is warm, 90 is hot, 100 is friggin' hot. I've met people who have worked in Europe and say that after a while you get used to it and can peg their numbers to fahrenheit numbers, but can't imagine trying to conceptualize a weather report that says it's 27.2 degrees out.
