That looks like the City of Detroit, not its suburbs, though I'm sure some of them do suffer some decay, in general Detroit's suburbs are pretty healthy.
My own hometown has experienced rapid growth over the same time span as Nashville, and has annexed large portions of what were commonly known as the suburbs. So there has been a literal change from what used to be suburbs to now be within city limits, in the course of a generation.
The incredibly low population density you can find on Wikipedia reflects the sprawling suburbia that composes the "city."