I think the reason we went metric in the first place was because, a) gas pumps only had two digits for the price, and when gas went over $1 / gal you had to halve the price and double the total of fuel pumped, which led to some disputes of legality, and, b) since Trudeau promised roll back Joe Clark's tax increases and not increase them, but he did it in spades within 9 months of getting voted back in as PM anyway, gas price increases of a few pennies a litre were easier to sell. And, c) its a French thing.
We can't even have one standard on one thing; I had to change a wheel bearing on my Chevy urban assault vehicle, 5/8" bolts held the unit on but the main hub nut was 36mm...huh? Yes, I had to go an buy that socket for just that purpose, and it was a 1/2" drive BTW.
Metric isn't necessarily that accurate either, 9mm ammunition comes in bullet diameters ranging from .356" - .358", small bullets don't engage the rifling and "fly" sideways.
The Celsius scale has only 100 degrees between freezing and boiling, the farenheit scale has 180. A temperature and dewpoint of, say 0C, doesn't indicate there will be fog or frost because the temperature may be 33F with a dewpoint of 31F. Decimals of degrees don't normally enter the public domain, but a temperature dewpoint spread of a degree and a half or two F can make quite a difference in forecasting fog, frost, or both.
No country in the free world is exclusively metric or Imperial. The US measure of volume isn't Imperial either, an Imp gallon of water weighs 10 lb, a US gallon is closer to 8.32 lb. Of course that wasn't a tough obsacle to overcome until we, along with other countries started adopting the metric system. That threw a whole bunch more conversion tables into the mix. It is the prime reason Air Canada's 767 FIN#604 ended up with half its required fuel load and deadsticked into Gimli. In a world almost exclusively Imperial, (with a small mix of US measurements) a crew was left to calculate litres to kilos but used the litres to pounds numbers instead, an easy mistake to make given the circumstances. Imperial weights are pretty much standard in the industry on this side of the pond; altitudes are in feet, distances are in feet or nautical miles, (except ground visibilities are measured in statute miles) everywhere in the free world, not confusing enough until you start throwing metric into the mix too.