> Which is why SF is so poor and underdeveloped. No, it's one reason why some US cities are becoming increasingly unlivable for anyone outside the upper-middle

> Which is why SF is so poor and underdeveloped. No, it's one reason why some US cities are becoming increasingly unlivable for anyone outside the upper-middle class - those who sell your groceries, make your lunch or deliver your packages (to name only a handful of occupations). > An easily identified excuse. Now do suburban Tennessee. Is suburban Tennessee an urban core?