I think an important question to ask is, do you have a DB pension that's fully vested? Because if you are one of the lucky few that still have that AND $800K, you're laughing. Most DB pensions have a Cost of Living Adjustment (or COLA). If you have that, you can help offset inflation. The reality is, at 62, you could theoretically live for 30+ years, and at the least, 15 - 20. Most inflation and taxes will take a bite out of your nest egg, and then there is the whole thing if you need care as you get older. That shit is expensive. Then of course there is the risk of a major stock market correction or financial crisis. Not sure if you've been looking at the bond market, but borrow rates are going really high, which will hurt the overall economy. And, there is always a chance that Donnie Dumb Dumb might put the US into default at some point.
I am not an expert on this by any measure. I do know a little about a lot, but its very narrow. Just be careful. You would hate to have to work at Walmart of something like that in a decade because you ran out of money.