One second, Mr. Twain. You're talking about a nation that has been rolling out a sensible system of measurement units for decades. By 2020 it has made its way

One second, Mr. Twain. You're talking about a nation that has been rolling out a sensible system of measurement units for decades. By 2020 it has made its way into engineering schools, but is still nowhere near the daily usage level. Surely the entire language will take a multiple of that. I think we should extend your plan to a few centuries.