I think it depends on your idea of suburbia. We tend to have smaller cities surrounding our major city. These smaller cities have mixed use neighborhoods - comm

I think it depends on your idea of suburbia. We tend to have smaller cities surrounding our major city. These smaller cities have mixed use neighborhoods - commercial and residential - and lots of multi-family homes. I grew up in such a city in a multi-family home (locally, we knew them as tenements). An article appeared recently about the trend toward purchasing multi-families again due to their cost-effectiveness. So, I'm not certain of the 30-somthings move to the burbs trend yet.