That 20-something <i>is</i> very stereotypical. I&#x27;m sure some cities are more attractive than others, but there are many that would not be interested in NYC of SF. Many more young people happily live <i>outside</i> of NYC and SF than inside those cities.<p>As for families, NYC and SF are unattractive because of their extremely high cost of living, especially if home ownership is important. If long-term zip-code stability is important, the competition for Buffalo wouldn&#x27;t be NYC or SF. Texas or North Carolina, maybe.