Again, you make lousy points but probably not downvotable points.<p>The Bay Area has a major tax disadvantage in prop 13. San Francisco is perhaps the highest taxed city in the USA.<p>If a geographical area is just slightly more appealing than another area, you would expect people to migrate there. So I&#x27;m not really sure why you think the concentration is irrational. It&#x27;s really the opposite.