Earlier quoted context omitted.
Yes, this is absolutely true. Your car, clothing, computers and gadgets, and most of your groceries will be a lower percentage of your discretionary income in the Bay Area than in most other places. Your housing and gasoline will cost more, and maybe your car insurance. However, the caveat is that housing is so expensive here that it's difficult to save up for a down payment on any kind of housing on a single enginee…
It takes about 2 years to save up $100K on a typical Bay Area engineer's salary, if you're fiscally prudent. Figure that $150K/year after taxes is about $110K/year, and live on $60K/year. That's eminently doable even in the Bay Area. The problem is that $100K is a very low estimate for a down payment in the Bay Area these days. Most people I know are getting parental help to put down $500K down, because with housing…
Regardless, whether it's 2 years or 3 years, to do the lifestyle you're suggesting takes and incredible amount of willpower to be willing to sacrifice and prioritize. It's passing up that cell phone upgrade. It's cutting discretionary spending to zero. It's passing on happy hour and bringing lunch every day.
While feasible, it's hard.. but suffering for two years to benefit for a decade. Quite possibly worth it.