[Chevalier]

Exactly. The US has virtually no surviving "urban" cities, where one can comfortably walk and bike wherever they need to go. (Much less enjoy the population density to support local coffee shops, niche stores, etc.) We have New York, Boston, DC (sorta)... Philadelphia? Maybe Chicago?

Even San Francisco can barely be called urban. It's absolutely dominated by automobile traffic, especially outside the tiny downtown core. I've never seen such fast-moving traffic on such wide streets in a city ostensibly hailed as walkable. Typical SF buildings are 2-3 stories at most, nearly all have attached garages or parking, and transit is hilariously awful.

Much less Silicon Valley. It's... suburbia. Try to walk from Google's HQ to Apple's. Try to walk anywhere, really, outside of a narrow strip near Stanford. What exactly does the OP feel is urban about Silicon Valley's car-dependent zoning?