Earlier quoted context omitted.
> the units don't matter. What matters is picking a system and sticking to it That is exactly the problem with the imperial system. You have multiple units for the same thing, and when they are multiples of each other, it is in base 12. You could settle on feet and have kilofeet and millifeet, and you'd have a sensible system (apart from being incompatible with the rest of the world).
It's easy to get dismissive about having multiple units, until you run into the contexts where they really are useful. Following up the example in one of my other comments: adopt the meter and the kilometer, or the foot and the kilofoot, and it won't matter to navigators, because they'll still use the nautical mile unless you literally put a gun to their heads, and if you do put a gun to their heads they'll show you…
Why? Why is it more practical? How is it better other than being more familiar? It blows me away that people can make the argument as it being "better".