As a newly graduated Site Reliability Engineer who's working in the Bay Area. I'm living and working in Sunnyvale, my expenses are way lower than expected, I was able to get a house a 20 minute bike away from work. I get a free caltrain pass, so I really don't need a car. I think the "cost of living" adjustment here is unfair. Sure, living in SF proper can cost you upwards of 8k-9k a month but there are MUCH more reasonable apartments where most of the tech jobs are in the South Bay area.