[melling]

Everything has a cost. NASA estimated their cost was $370 million to switch to metric.

https://www.cnbc.com/2015/06/04/why-the-us-hasnt-fully-adopt...

The cost of switching road signs alone was quite expensive. Exit numbers, for example, are often the mile marker number.

[adrianmonk]

Oh yeah, I'm not saying there's zero monetary cost. I'm saying the blocker isn't affordability.