Joel Kotkin wrote:

Perhaps nowhere is the gap between America’s cognitive elite and its populace larger than in their preferred urban forms. For nearly a century—interrupted only by the Depression and the Second World War—Americans have been heading further from the urban core, seeking affordable and safe communities with good schools, parks, and a generally more tranquil lifestyle. We keep pushing out despite the contrary desires of planners, academic experts, and some real estate interests. In 1950, the core cities accounted for nearly 24 percent of the U.S. population; today, the share is under 15 percent, according to demographer Wendell Cox. Between 2010 and 2020, the suburbs and exurbs of the major metropolitan areas gained 2.0 million net domestic migrants, while the urban core counties lost 2.7 million.

This is less a growth in “bedroom suburbs,” supplying workers to the urban core, but one that serves multiple employment centers and commercial development. The latest edition of Commuting in America estimates that almost 70 percent of metropolitan-area workers now live and work in the suburbs; trips within suburbs or suburb-to-suburb commutes constitute more than double the commutes with a central business district as the final destination.