Seems to make sense to pair up with another engineer. Assuming both bring in 200k per year, what becomes possible that might’ve not been before? Edit: not sure if it matters, but assume a couple in coastal Southern California. Not Bay Area. Same salaries / situation.
Go find out and report back
Children
I dunno man, fancier cars, earlier retirement, luxury travel, more about what you want really.
Being able to contribute funds resolving issues for less fortunate that you thought somebody should have helped with
Luxury furniture. Frequent trips to fancy restaurants. Charity. School donation more than average parents. Bigger or newer house. More cars. Luxury cars. But they are all nothing if you want to focus on saving money like lots of Blinders here. They chastise if you say you buy a luxury car unless you make 2 million per year.
At some point u wont see much of a difference. Better grocery, if u do care - better clothes blah blah. But if you are asking that question money was never your concern otherwise you would know what you can spend it for. Do some charity and enjoy life 😉
FIRE
I guess you can start a family in Bay Area?