This is a popular meme, but it can't possibly be true that (most) US cities have been founded since the automobile was invented.
I live in a northeastern US city that has streets going back to the 1600s. The oldest (continuously inhabited) city in the US was founded in the 1500s.
Here is a list that supposedly has founding dates of various cities and it looks like hundreds listed in the US are before 1885; less than a dozen after:
https://en.wikipedia.org/wiki/List_of_cities_in_the_Americas...