The US has no issue with the metric system, and most engineering and scientific people switched decades ago. The military is mostly all metric too. The general public of the US is a harder nut to crack, asking a population of stubborn freedom lovers to change something they’ve known their whole life is damn near impossible.
I switch my stuff to metric all the time, and the usual response isn’t “oh that’s interesting”, it’s nearly always, “the fuck is wrong with you, why would you want that weird shit?!”. If the government suddenly made all weather reports metric, the T-Shirt sellers would all become millionaires overnight from selling anti-metric slogans.