My friends that still use it are almost/are 40
And don't get me started on San Fran. It is The City, SF or San Francisco. The only one I let get away with it is my Grandpa who trained with United in SF in the 50's. He'd call it Frisco and had fought in WWII plus a different time so he got a pass
But most other people I correct, especially if they are planning to go there. I will tell them, do not call it San Fran while you are there or people will get annoyed.
I don't mind Cali but to me it's a SoCal thing not a NorCal thing. But I see Cali as fun in the sun and surfing