You should have an emergency fund that covers six months of expenses, ideally you never touch this. If you quit without another offer it's safe to prepare for a job hunt lasting up to a year. Six more months for safety is just smart.
Work 6 months for minimum wage in a major city and you'll find what most people consider 'low wages' to be laughable.
Of course, you should do everything your power to have and maintain an emergency fund, but two years of savings is insane. Don't waste two years of life if you are unhappy in your job just because you're afraid of not finding new work. 6 months is a good target to shoot for.
Unless you meant as a childless single person making 200k/yr. Then yes, it's easy.
Does $200k not seem low for a two-income family? Does paying for childcare not seem strange for a one-income family?
Not really, even in the BA, unless they are both in tech or similar; $200K is nearly double the median household (not individual) income for San Francisco & San Mateo Counties.
Surely if you work somewhere like that you're pretty employable and not in the middle or nowhere. Why not just go work elsewhere for a bit while you work out what you really want to do next?