So in the early 1980's I'm driving from Grand Forks, ND to Winnepeg, Manitoba with my parents in my Chevy Citation. My dad, who have driven American and English cars in Germany, kept doing the conversion math in his head every time we approached a new Canadian speed limit. He started getting miffed that I wasn't following his approximations. Then I pointed to the speedometer: white outer numbers in mph, red inner numbers in kmph. "That's copacetic." he said.
I don't think I brew with a measuring cup, scale, or thermometer that doesn't measure both ways.
Yes, the metric angst had value in the Carter days and earlier.
Now that there's an app for that, it's just posturing.
