Everybody who needs to uses metric anyway, it's just for social things like height, weight, how far you're driving, temperature, etc. that people use imperial and it's because one who grows up under the system can "picture" it when somebody says a guy is 400lbs or it's 90 degrees out. The cultural transition required isn't worth the hassle because industry, sciences, government, etc. already changed on their own.
Also once they take our yards away they'll replace our real MANLY AMERICAN football with sissy metric football.