> why the US never switched to metric Pretty much exactly why the UK didn't. What, you say? The UK uses metric, right? Yes, in much the same way as the US d

> why the US never switched to metric Pretty much exactly why the UK didn't. What, you say? The UK uses metric, right? Yes, in much the same way as the US does. Officially, the US gov't stance is metric. And in technical areas as well as much of the consumer space, metric is everywhere. What isn't really changing is layperson preference for units. People are comfortable with feet, yards, miles, Fahrenheit, etc. Just like the UK still using miles, and many normal people measuring weight in stones. Inertia is a pretty important consideration, and not invalid. Imagine trying to convince the UK to drive on the correct side of the road at this point. ;-)