For the benefit of Canadians, Jacobins, progressives, engineers, and stuck-up stickybeaks of all stripes, I herein explain why the metric system is inferior to traditional systems of measurement for those who work with their hands, think with their right brains, and prefer not to resort to a calculator for every little thing.
Metric vs. traditional systems
First, I don’t like the term “metric system.” Either it refers only to the meter and ignores all of the other units of measure (which is silly), or it implies that it’s the only system that is metered (which is also silly). What is commonly called the metric system is part of a much larger system of measurement known as the International System, or SI. (The abbreviation is backward because it comes from the French, and they do everything backwards.)
The SI is all decimal, and its units, which include familiar ones like the watt and the second and less-familiar ones like the joule, are all interrelated in a very nice way that I won’t trouble to explain here. (You can read about it here.) It’s a very nice system, for many purposes — but not for all purposes. (I’m unnecessarily familiar with it from having been, at some time late in the last century, a theoretical physicist in training.)