Quit. Pack your bags, move to low cost of living area and just code.
Seriously, if you're > $200k comp last year and this year should be at least equal to $200k comp and you're not at the point of being able to retire with already 15 years of work behind you then you're doing something wrong.
Not everyone can just pack up and leave. Especially with family. Plus, low cost of living places aren't always the most pleasurable places to live even if it means getting to spend the whole day coding.
So if you make $400k over the course of two years you should have enough money to retire? Well, taxes could wipe about half that out, depending on what state you're in. And if you have a family... well that will eat up a nice chunk of what's left.