Maybe I have to cover a road with 11 inch long bricks and I need to know how many to buy? The problem is that although perhaps certain units may be good for me

Maybe I have to cover a road with 11 inch long bricks and I need to know how many to buy? The problem is that although perhaps certain units may be good for measuring certain things, the things you use those measurements for will frequently involve things that use different units. To take your road example again, what if I want to find out how many revolutions it takes a wheel with a 4 foot circumference to travel a mile? What if I want to find out how many yard long strides it takes to go down a road? The metric units are interoperable. That's their big advantage.