

that’s the thing with customary units, you generally don’t change them. If something gets unruly in a unit, you just make a new one and any conversion factor is just trivia at that point.
Astronomy did it several times with AU, light-years, and parsecs. It doesn’t really matter how many meters any of those are.


It’s really frustrating how many people don’t understand the systems are equally arbitrary. A barleycorn is just as arbitrary as one 10 millionth of the distance between the equator and north pole (or recalculating that based on the speed of light)