$200K after taxes and insurance and 401K contributions comes out to around $10K a month. If you live in a low cost state, that's great. If you are stuck in SV, that's not as great.
Also, when I interviewed with them out of college in the late 1990s, they offered stock options and if you worked there 7 years, you get a paid 3 month sabbatical. I'm not sure if they still do that; that was in the Andy Grove days.
I wanted to learn databases and application dev. They wanted me to wear a bunny suit and support their VAX/VMS systems. No thanks.
It's really a perspective and "keeping up with the Jones's" situation.
You are a tech engineer and "live comfortably" means that you "live like a tech engineer" in the area. Which means "not making financial sacrifices to work at company X".
Live comfortably for some people means single family home with yard, 4 bedrooms, 2-3 annual vacations, eating out once a week, shopping at expensive grocery stores, etc. etc.
Now put all these $200k or dual income $400k people in the same area and it becomes a race to the bottom of "who is willing to live closest to paycheck to paycheck".
In the US, salaries are always given as gross (pre-tax). Someone earning $200k gross in California would take home around $130k/year if single and $145k/year if married.
The more money people have, the bigger they spend, the bigger their monthly payments are. Somebody making 100k and somebody making 200k both feel like they're barely getting by. Meanwhile somebody making 50k (in the same city) is also getting by, but may as well be invisible to the first two..
If half your income was spent on rent that would be an insane 8,3k a month. and you would still have another 8.3k left.
That left-over amount is more than twice what i earn, and i live fairly comfortably, alone, in the middle of Oslo.