alt Hacker NewsOh, he means that companies are adopting metric internally. If there would have been significant progress in adoption of the metric system in any public-facing field lately, Trump would have surely railed against it, same as he does against renewable energy and other subjects he perceives as "progressive"...
I've heared Americans, unironically, state that the metric system is less precise than the imperial system.
I have no clue what the origin is of this myth, but at this point I wouldn't be surprised if Trump held this belief too.