I lived on the Peninsula in the early days of the first boom, and it was heaven on earth. Housing available for all classes, plentiful employment across the board, the city itself was grainier and edgier but also much more open and welcoming.
The current-outrageously-expensive cities on the Peninsula were filled with normal, middle class people. Middle-class Joe and Molly could afford to live anywhere from city neighborhoods to San Bruno, to San Mateo, Millbrae, Burlingame. The entire Avenues was middle-to-lower middle class and affordable as hell if you could handle the fog and chill. The entire venture capital, tech bro, "disruptive" bullssshit thing hadn't gained traction yet, and it was just a wonderful place to live, recreate and work.
I hate to even visit the Bay area anymore. Overstuffed, overpuffed, filled with ][/quote]
SF was on the skids way before that. The 60's hippies etc. started the rot. Listening to really old timers, the 50's were how you describe above, by the late 70's both the overall quality of people was going down and prices were inflating compared to other places.