No one knows how long to recover ..2008 was almost recovered in a year ….2000 adjusted for inflation was 12 years ….
but so what .,,even at 65 there is money that won’t be used to eat for 20-30 years …that is the money that goes in to equities .
a 60/40 portfolio has more then a decade in bonds and cash.
are you saying all your retirement money is in equities late in the game ? That is not a market issue if that is the case it’s a poor planning issue …
I suggest you read kitces article on the red zone…
if one is a few year out from retirement then 100% equities is likely not a good idea
https://www.kitces.com/blog/managing-portfolio-size-effect-with-bond-tent-in-retirement-red-zone/