Except, its been pointed out numerous times that the metric system is used in the US.
Which makes it all the more necessary to adopt it completely. Having an eccentric measurement system is not convenient, but having two measurement systems is absurd. Like I said, the whole point is to have a single standard.
But you're mostly right on the following point :
The fact that the imperial system is used in most domestic cases is largely inconsequential to most anybody in the world not living in the US of A.
So again, how is the US's internal use of imperial units affecting you, whoever else that is affected so deeply that they had to chime in and whatever country you/they are from ?
Indeed, and most people don't really care if you decide to keep using this system. It's mostly an opportunity to laugh at silly habits that most countries have, but in the end it doesn't matter much.
It's still slightly annoying in the 21st century, now that everybody around the world is communicating with each other (just like what we're doing right now), and to have from time to time to convert from one system to another when we could all be using the same one (especially since you already know it !).
My point is that the WWII events explain why Germany didn't get the opportunity to develop a space program or a nuclear program :
- before and during the war, the Germans did work on rocket science, and established the basis on the future technology by funding the likes of Werner von Braun. Of course the first application was V2 missiles.
- after the war, basically half of the scientists were "retrieved" by the US, and the other half by USSR, to launch their own projects.
That and the other scientists that fled the Nazi government before the war explain how the USA and USSR developed both rocket and nuclear science, based on German knowledge.