But this is bound to happen whenever a region reaches a level of success. There will be incumbents who are enjoying their cushy positions which they rode into when the times were greater than ever (e.g. Boston Brahmins, people in 'company towns', early mom-and-pop/neighbor/Stanford-prof/etc. investors in SV companies like Google, FB, etc.). The children and proteges of the first couple of successful generations of Bay Area are now working age or older. They have their own networks formed in high school, neighborhoods, parents' companies and so on. I think this kind of establishment of an establishment starts once the first successful generation has children. One indicator of the 'establishment' is you have people using family connections- 'my dad's friend is the VP of blah blah,' etc.