Comment by BoxFour

I see what you're getting at. My intention was to highlight that I don't believe Silicon Valley culture is synonymous with Bay Area culture. In my interactions with individuals who were raised in Northern California or even the Bay Area, I’ve seen a lot of “guess” culture fairly similar to the PNW.

To phrase it differently, a significant number of the people you’re thinking of probably wont establish lasting roots in the Bay and thus wouldn't be passing down that culture to the subsequent generation of Bay Area youngsters.

It's a thought-provoking query indeed though, pondering what characterizes the "prototypical San Franciscan" and how that might evolve over time!