For better or worse more effective organizations generally present themselves as a unit with aligned interests. Organizations with misaligned internal interests get as far as the lowest common denominator among their interests weighted by the relative power of members. That’s a far more significant factor than choice of measurement standards.
https://en.wikipedia.org/wiki/Mars_Climate_Orbiter#Cause_of_...
Think what could have happened if the Apollo Program was an international effort and not a U.S. only one.