^^In other words you don’t know. That’s fine…
Rude...
What the fuck kind of answer do you expect?
That long a retirement is too unpredictable to just say "this multiple of indefinite spend is safe." It just doesn't make any sense.
So no, of course I don't know, no one knows. The 4% rule isn't even a rule, it's a vague starting point and from there each individual needs to try and figure out their own needs and risk tolerances.
It's actually the same for everyone. The 4% rule is based off of a pattern of spending that no real human would ever do, so it's math done with made up numbers.
25X is and has always been a reasonable starting point. But one person's 25X might be based off of massive spending with enormous amounts of fat and really easy places to cut, while another person's might be ultra lean and have no flexibility.
If I have saved 25X, but X is 120K, but only 40K is for my core expenses and 80K is for travel, equestrian, cosmetic treatments, and I'm okay cutting those things, then I'm perfectly fine retiring at 25X in my 30s.
But if I've saved 25X and I'm living on 12K/yr and it requires me to never own a car, live with roommates, and dumpster diving for food, well, I'm pretty fucked even if I've retired at 70 because if my needs increase at all, I have no wiggle room.
The "X" in 25X is largely arbitrary, so the risk associated with multiples of it is largely arbitrary, and the real risk is based more on the person's real life risks. In fact, the longer the retirement, the *less* relevant the market risks because relative to the shit that can change in a person's lifetime, that market risk is tiny.