I'd refine that some to "places where most development occurred post WWII, and they didn't maintain a tradition of mixed use development", so a lot of the US, e

I'd refine that some to "places where most development occurred post WWII, and they didn't maintain a tradition of mixed use development", so a lot of the US, especially in the west, Australia and Canada too, most likely, although I'm less familiar with them. The US used to have corner stores and fairly walkable places, but it's something you find in the older parts of towns and cities, and it may have decayed since it wasn't prioritized much for many years.