Metrics is way easier for math and science, but the English system does make some sense for everyday use because it formed from everyday experiences. A foot is about the size of a foot so you can quickly approximate size by lining up your feet. A yard is roughly one pace so you can approximate larger distances simply by walking it. Inches really are ideal for measuring construction materials and snowfall, as the smaller metric units of cm and mm are really too accurate for these and the next SI unit up, the dm is too large. The Farenheit temperature scale doesn't make much sense until you realize that he lived in a fishing village on a bay and was more concerned with when the saltwater of the bay would freeze, so based zero on that, and the degree size is more ideal for measuring changes in temperature. The Celsius degrees are too large IMO. No, you don't really want to do things to scientific accuracy using English units, but when we need to do complex calculations, we have SI. So perfect situation.