The perspective is not long enough. The view is still too close. The assumption is the cities, the great cities, are ongoing forever.
It can be argued the cities are obsolete. The reasons compelling businesses gathering in close proximity are gone. The need to have people very close to the jobs gathered in close proximity is gone. The skids greased over and over to make the system continue have become worn and rough.
The grease no longer reduces the friction like it did for so long. There is no new rational thought. There is only extrapolation of existing dogma.
There is an obvious biological component. The nature of the city residents has changed. The new residents lack the native ability to conduct business in a non corrupt manner. They lack the ability to innovate successfully. They can only stagnate. They are innately harmful to the collective freedom necessary for the city to function.
There is no solution but to let the coming conflagration occur.
Cities nowadays are less for production and more for consumption. That may not be sustainable, but a lot of people have moved back to the cities over the last 20 years or so.