Metrication (and other stuff) again) ..
America is suffering from the same syndrome that afflicted Britain a century or more ago: the belief that because (we thought) we ruled the world then to adopt any ideas that were Not Invented HereTM would be a sign of weakness and an admission that someone somewhere else was doing something better than we did, which was unthinkable.
There's a theory that something similar contributed to the fall of the Roman empire: while their neighbours were innovating new things they rested on their laurels, believing in their invulnerable superiority. Beware the March or Ide(a)s!