That only affects new construction. Most places aren’t growing anywhere near fast enough for such a quick change, nor are there anywhere near enough contractors or supplies

My town has most of it (but nowhere should accept individuals impacting road safety and maintainability) and is somewhat walkable but most of that was from being built out before cars.

We did have a recent zoning change to encourage more higher density housing near the center (up to six stories “as of right” == streamlined process) and have several new apartment blocks going up, but there’s no way that’s sustainable and doesn’t help the walkability of the rest of town