> it would be atypical for a suburb to have significant independent restaurants within 5mi of any given point

Some cities, like Dallas, seem to have a higher percentage of chain restaurants than the average suburb. Other cities, like Seattle, have a ton of restaurants that seem independent but are actually part of a portfolio of restaurants owned by one person, private equity, or a corporation experimenting.

I expect uber eats will scale very well in the suburbs if they can get multiple orders in the same car efficiently. Restaurants are experimenting with food that travels better.