Oh, he finishes with the flaws of Detroit that still remain so today [[and ultimately/temporarily[[?) stunted the growth of Michigan):

To be sure, Doxiadis added firmly, "Detroit's role is not the most important at present. It is an industrial center, but it does not provide services for a major urban area. It is not attractive as a center city."
So basically, Detroit's flaws are cosmetic, and that explains why Chicago has rebounded to become the Midwest's best performing metropolis over the last few years of the 20th century and first decade of the 21st. If Chicago's mindset were in Detroit's physical location it would be a great city......