I think your points are good, but not everyplace needs to be a high functioning mega city. Better design can make better places, even in the surburbs. It doesn'

I think your points are good, but not everyplace needs to be a high functioning mega city. Better design can make better places, even in the surburbs. It doesn't even have to be new design. I'm reminded of places like Reston, Virginia which was designed specifically for most of the things you mention, but is also decidedly suburban. There's an urban core, but most homes are reasonably walkable to some local shopping or some other major amenity. It was also designed as an enclosed area, to contain substantial commercial and office areas, and a mix of densities and housing types so that it might be possible to both live and work within the same environment. I don't think it's "hard" but it has to be purposeful. Too many areas in the U.S. are built by developers who dump the development once the human units are moved in and have no stake in long-term governance of the area.