memes

There will be holdouts. In my part of Canada all the rural roads are laid out in a 1 mile x 2 mile grid. Nobody every says a farm is 3.2km away. It's 2 miles. Even changing all the road signs is cheaper than moving roads to make more sense in the metric system.

Otherwise for long-ish distances we're completely metric.

I was taught it in rural Ohio in the '80s, but it was never used outside of science in any meaningful way. Now live in metric land where things make so much more sense.

Technically US customary units were re-defined as specific values of their equivalent metric units (for instance, 1 inch === 25.4 mm), so you are using the metric system regardless, but with weird conversion factors.

The majority of U.S. customary units were redefined in terms of the meter and kilogram with the Mendenhall Order of 1893 and, in practice, for many years before. These definitions were refined by the international yard and pound agreement of 1959.

https://en.wikipedia.org/wiki/United_States_customary_units

Maybe a decade of decades. But it'll eventually get there.

There's too much infrastructure based on even units in imperial that would "turn into" a partial digit if forced to stay the same.

Example. 1/2"wrench would be the same as a 12.7mm wrench. And a 1/2-13 bolt would be a M12.7x1.9532 bolt.

That stupid conversion makes no sense, so we just use both. Eventually as we replace imperial infrastructure with metric, we'll use more and more metric, and less imperial. Until eventually it's all metric. Though a common structural lumber will likely still be called a "2 by 4" even though it's measurements would theoretically be 35mm X 85mm. And nobody will remember why.

Nah, we have already reached the point of being a mix depending on tradition. We have been bottling soda in 20oz bottles and 2 liter bottles for decades and changing all the speed limit signs would cost too much to gain any traction. Just a confusing mix of whatever!