You could easily spend 10k on commuting. That's only about $40/day. Between fuel, maint, tolls, and maybe food, you can easily bust $40/day in the Bay Area. That's not even considering the _time_ spent commuting.
I already hated cars, but since I began WFH I've become really averse to driving unnecessarily. Getting killed by a car is one of the absolute stupidest ways to go. My dad smoked all his life and still made it past 60; my brain could hit pavement tonight if I run out of milk.
And the worst part is that it wouldn't have to be my fault at all, and it wouldn't even require somebody to do something extraordinarily reckless. Driving too fast through my neighborhood is typical, because it happens to offer the shortest path from A to B for many people, and the road is wide thanks to bike lanes that I have never seen bikes in (because: cars drive too fast). I'll cut myself off here before this becomes an overly long screed.
My car conveniently started having reliability problems about the same time I started working remotely. We're not talking "oops need an oil change today" but "car won't start for weeks on end and is in the shop more than it's on the road". When I had to commute to the office, this would have been a pants-on-fire career-ending emergency, but now it's just a minor inconvenience. I might just sell the damn lemon and get a bicycle for those rare times I need to go anywhere. Would not have had that option with my previous 50 mile (each way) commute.
I so rarely see this pointed out in the WFH threads, but it is one of the biggest ones to me. I don't want to get killed by some idiot driver for the sake of the company I'm working for.