A lot of people are seeing this as a problem. I think there are many positives to it. 1. Over years American cities have built their specialties. It is much ea

A lot of people are seeing this as a problem. I think there are many positives to it. 1. Over years American cities have built their specialties. It is much easier for children to find job in same field as their parents and settle in the same city as their parents. 2. More Americans now own housing makes sense to stay with parents. 3. Millennials have invested more in education and other things than spending money on rent. Very likely these millennials would end up saving more and form the backbone of american middle class over next 20 years.