Earlier quoted context omitted.
One thing that San Francisco has that somewhere like Detroit doesn't, is the affluent residents with the ability to sustain a service like Uber or startups such as food delivery. Those kind of services are viable to create a startup focused on in SF but not in Detroit.
I've been told that the suburbs immediately outside Detroit city limits are rich as Croesus.
Its gotten to the point that some suburbs are big enough to develop their own suburbs. Notable Troy, South-field, Ypsilanti, Ann Arbor, Sterlining Heights.
These started out as satellite cities to Detroit, but since Detroit suburbs grew, the satellite cities suburbs grew. Its just a massive sprawl.