I live in a suburban American neighborhood, built in the mid 2010's, which has ample walking paths and wide sidewalks. In fact, I cannot think of any newer neighborhood in this area which lacks walking infrastructure. Good sidewalks are a minimum. Usually there are dedicated walk and bike paths.

What is lacking is places you would actually walk to. There are numerous parks and a pool. But that's it. Don't get me wrong, it's great if you have a dog or enjoy running or walking. But I still have to drive everywhere.