I wonder where you're going with this question......
Folks who are worth more today than when they ER'd will no doubt have some special circumstance such as pensions that cover all expenses, investments that are completely avoiding the current downturn, inheritance, insurance or legal award, etc.
Retired in '05. Don't have the exact figures as some are difficult to value right now. I'm saying "equal or better" than when I retired.
While youbet calls it "special circumstances" I like to call it "diversification" even if that diversification is a bit bizarre. My relatively low equity portion of the PF took about the same hit as everyone else's here.
Yes, I do have a pension but it only covers about 1/3 of my outflow - this year, anyway. Nor is it COLA'd. So I look at my pension as being worth LESS than it used to be even though the dollar amount is the same.
But my house value has been relatively stable since '05 (up since then and then back down a bit - roughly a wash - but who knows if I don't actually sell it which I don't plan to do.) So while most have lost money on housing, I'm saying it's roughly the same.
Cash portion of PF is mostly in Stable Value funds and SPDAs - in total they have gone up at a rate of nearly 5% per year. This is the largest portion of my PF. Figure I'm significantly ahead though a case could be made for discounting to inflation since '05.
Bizarre (diversified?) portion:
Gold and silver coins pitched into the bottom of the safe deposit box - up quite a bit in the past several years. Probably covers most of my losses in equities.
SS (both DW's and mine) value has gone up with inflation though DW just started last month and I'm waiting. But the "value" has gone up at least in dollar amount - maybe only equal based on inflation.
"Rothing" my IRAs - yeah it cost me some taxes, but I consider that I now have MORE in IRAs than I used to and everything I've converted is now "tax free". I get to worry less and less about the inevitable RMDs at age 70 (talk about priceless!) So I consider the value to be higher.
My share of (very) small family bidness - profits up so guess that means value is up. How to value? Who knows?
Collectables - Just have to trust me on this. Value is UP. Not a huge portion of PF, but a few % at least.
So I guess I'm saying I agree with youbet that my PF is not "typical" but I'm guessing most of our PFs aren't typical. We have a wide range of situations and circumstances which may make it difficult to value our PFs or be certain if we've gained or lost value. Still, I believe I could make a good case that my PF has NOT gone down and maybe has increased since '05. Of course, those with more "traditional" PFs experienced much better results during the "good" years than I did. But YMMV, and FWIW of course.