Are you outcherfukinmind?!? We were this close [/me pinches fingers some 5 mm apart] to going completely metric in the 80's. Guess what? "We" elected a brain-dead xenophobic cowboy who couldn't understand the concept of a liter, a kilogram, or a kilometer.
Compare and contrast that with today, where "we" have just elected a brain-dead xenophobic cowboy who can't understand the concept of a liter, a kilogram, or a kilometer.
YKMV (Your Kilometerage May Vary)