You gentlemen are certainly thorough in your responses!
I had thought that something like that might have been the case. Many of us are resistant to change, and I see that this is a long-held tradition!
Currently, we have two systems of measurement, the inch-foot-yard measurements, and the metric system. As I was an environmental scientist for many years, and had to deal with homeowner's, the legal system, and my scientific colleagues, I of necessity had to be fluent in both systems.
Then, of course, we also have fathoms, chains, cables, acres, and so on. The world is, indeed, a complex place in these times. Toss in decades and scores, and a few weirder terms.
One that I struggle with is "alquiries", a system of land measurement still currently used in Brazil. And some states there have different definitions of just what an "alquirie" is. It can be equal to 6 acres, or to three hectares. Fortunately, I no longer own land in Brazil, so it no longer matters to me.
As long as 2.54 cm = 1", and 454,54 grams = 1 pound, I'll be OK. And BTW, 20 dwt = 1 ozt!