I’ll tell you, most of us in the states would love a total switch to metric. We use it where is matters most, but we also have an aging population raised on lead has fumes that think anything they don’t know is “communism” or “wholeness” or whatever else the propaganda right spews. Those are the assholes that pretty much stop progress on anything.
I’m big into 3D printing, actually got into the same argument with another 3D printing guy…. And I’m like, literally EVERYTHING we do is in metric. The whole damn hobby is metric.