For it to be feasible you'll need a totally planned city from the beginning, with a highly developed public transport system and strict zoning, in a country where people would be willing to park their cars away from home or even do without owning one.

Retrofitting it to a high-rise city would be a disaster, but designing a city for it from the beginning might be possible.

Problem is that it would cost a lot to make the infrastructure that would make it interesting to move there, money you wouldn't get back until people started moving in.

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An emperor without enemies, a king without a kingdom, supported in life by the willing tribute of a free people.