Earlier quoted context omitted.
The amount of time and money to shift at this point would be astronomical wouldn't it? It would take a few generations as we would continue to have to teach imperial so people could convert when they ran across any existing media referring to the imperial system measurements. Hundred years of machines that use imperial, speedometers, odometers, books, tools, software, air conditioning, heating, manufacturing, constru…
The total cost to switch has gotta be in the hundreds of billions of dollars. Has anybody done such a calculation?
https://www.youtube.com/watch?v=NgtsSM7vN0M
It starts a bit slow but stick with it. I'm currently rewatching it after several years so I'm not sure there is a calculation. I think there is. A lot of the production in the US already is metric so it shouldn't be that expensive.
Remember that everybody else also had to change their (many) measuring systems over to metric. It went remarkably well.