Never happened in first place...
Couldn't agree more. All these "re-urbinazation" tales never came to fruition. While some cities had some increases, if you look historically, they often still have not reached their 20th century peaks. Manhattan at the beginning of the 20th had 3 million people, then it declined to 1.5 million by 1970. It's still "come back" to only 1.8 million and then stagnated.
More people want controllable political environments, shorter commutes, less crime and an escape from overbearing and corrupt machines politics of the obsolete cities that a town ( 50,000 to 100,000 ) can offer.