I just moved to the bay from the enterprise world, so my net worth is 400k. At this rate, assuming very conservative raises and 6% on all investments -- including already reserved stock units -- I'll be worth $2.2m in five years (age 40). $7.5m by 50.
And that's just assuming I hit $400k-ish in the next few years and stay there for the rest of my life, and my wife gets no significant raises. If I get higher, which is entirely possible, I'll make even more. Or maybe at some point I'll try for a startup and go for the really big money. Maybe not.
Of course, many of those assumptions could not work out. But the kind of exponential advantage of saving a large fraction of your paycheck eventually overcomes any disadvantages. Worst case scenario is tech goes bust and US stock market turns into Japan's in the 80s, but in that case I'll still be better off than most because I have a lot of savings and I'm not addicted to the paycheck.
I think the plan will be to do this for a few more years and consult part time. Full retirement would be too boring.