I dunno, a vast sea of parking spaces with the occasional building sums up suburbia for me.

But ok, it's not called "SimSubUrbia"...

But it has the suburban cars and suburban zoning, without the parking lots or even a full simulation of the generated traffic (because that would render it nearly unplayable). It sells new generations of potential urbanists on the idea that a car centric city can work as anything other than a failing pothole filled parking wasteland.