There's plenty of easy and cheap options that can be taken to shift cities away from car dependence without tearing them down and rebuilding them.

step one would be to abolish mandatory parking minimums. if a developer wants to use their entire lot size for housing and not provide any parking, they should be able to. if the market demands parking, the market can build market-rate parking. it's ridiculous that we have legal requirements for how much housing there is for cars, but not how much housing there is for people.