> They'll almost certainly be cheaper than the costs of treating the effects of aging. Will they really reduce the medical costs of aging when you take into ac

> They'll almost certainly be cheaper than the costs of treating the effects of aging. Will they really reduce the medical costs of aging when you take into account the longer lifespan? To borrow an argument from a different branch of the thread: if everyone lived to be only 20, would you expect that medical expenses would be more than they are today, or less?