As an American who now works in science, I won't agree to weirdos but will wholeheartedly agree to the metric system. We were introduced to it when I was a young kid in school decades ago but that's about where it stopped.
There is a lot of entrenched, systemic stuff that would need to adjust like land plots and such and would take some time to fully adopt but I am convinced that it should be implemented so that in time, it will become second nature.
Weirdos? Unpopular. Concept? Shouldn't be.
Hang on. I'll grab a bit of Irish Whisky to toast solidarity.