Regarding old people, retired people are actually the fastest growing demographic in the city.
This, 1000x this.
Repeating a grammatical error 1000 times does not make it "more better".
If you look at actual statistics, they do seem to back up my impression: income in SF is not your typical bell curvish distribution you'd see in many other places. There are a lot of people making a lot of money, more at still quite a bit of money, and a small peak for those making very little money, and fewer in between:
http://www.city-data.com/income/income-San-Francisco-Califor...
Look at:
Distribution of median family income in 2009 (number of people)
Distribution of median household income in 2009 (number of people)
Douché.
If you look at actual statistics, they do seem to back up my impression ....
You're either confused about my comment or making a completely non sequitur argument for the heck of it. The claim I agreed with was that there are actually a lot of (largely minority) kids and people with average jobs in SF.
That is true and can be shown so by inspection, at that.
There are plenty of kids and families who live in my neighborhood (I'm on the cusp of Union Square and the Tenderloin). If you take a ride on the T towards Bayview in the middle of the afternoon, you'll also see plenty of kids.
Are the public schools in San Francisco just empty, waiting for families to move in and send their kids there? Of course not. As for people with "average jobs," who do you think is serving you that latté, helping you at Macy's, or cleaning your office? They don't just ship all of those people in from Oakland.
That San Francisco has no children or working class is a preposterous idea, mostly advanced by those who fail to step outside of the high-rent parts of the city.
The outer Sunset and Richmond have lots of families and older folks.
I've dropped this link many times before, but it's still relevant here: http://www.slate.com/articles/business/moneybox/2012/05/face... . There's not really a "weird bubble" so much as basic economics at work: SF is a desirable place to live in many respects, but it's virtually impossible to build new housing there for reasons discussed at the link. In the face of exploding demand and constant supply, prices rise.
Regular people move to the sunbelt, where development is easy and real estate prices more reasonable, and the people who have the money and/or need to be in SF stay/move there.
Also, some people - a minority, but "anecdotally significant" - seem to be a bit smug: like living in San Francisco makes them better somehow.
That said... I don't regret the time I spent there, and it's a city I heartily recommend to Europeans visiting the US, as it'll be a lot more familiar to them than something like Los Angeles, and it has a ton of stuff to do and see. And California in general has probably the most variety of any one US state in terms of geography, so if you get bored of the city, you can go the mountains, or the "lost coast" up north, or Death Valley, or pretty much whatever suits your fancy.