Aside from shutting up a few whining Europeans, forcing a nominal change, road signs etc., will only cause useless death in the change over. American deaths are probably seen as a good thing by weak Europeans, but all science is already done in metric, you probably knew that and replied anyway.
The left seems to believe that projecting weakness is a virtue. Poor dumb bastards, they will always be weak to appease their own doctrine but will not be allowed.
You have to kind of feel bad for Chumsky, he wishes so bad for America's demise that he has to fluff up China and Russia, while completely ignoring the fact that the West is far better off with the US in charge. Utter chaos and death would be the reward for listening to his hate.
America is growing weary of butt hurt euro-whiners. Soon Europe will pay for its own defense or reap the whirlwind. Also Musk is extremely patriotic so piss off and do something worthy in EU.