If you're part of a nuclear family in urban/suburban America, you'll notice that neighborhoods tend to turn over at about the pace children go through K-12 scho

If you're part of a nuclear family in urban/suburban America, you'll notice that neighborhoods tend to turn over at about the pace children go through K-12 school. That is, new developments are frequently bought up by new parents (or aspiring couples), then the houses start turning over in 8-12 years as kids grow up. It's a natural cycle.