A 95% chance that your portfolio was not depleted (and in fact almost doubled on average to $1.86M in inflation-adjusted dollars). I'd call that pretty conserv

A 95% chance that your portfolio was not depleted (and in fact almost doubled on average to $1.86M in inflation-adjusted dollars). I'd call that pretty conservative. If you want absolute guarantees, life just doesn't have them. Not even if you bury your money in the ground.