Pre-2009, my realtor suggested me buy either Mountain View or Sunnyvale. I did not realize at that time and skipped many good homes at that time!
Google, Facebook, Apple,Netflix....etc companies recovered/came up and billions poured into these companies. This changed those cities.
Across bay area, many cities, homes were doubled between 2009 and 2016. We can not compare the 2009 prices any more.