There are more interesting ways to talk about fertility than extrapolating it out to infinity. South Korea isn't going to "disappear". Not unless its northern

There are more interesting ways to talk about fertility than extrapolating it out to infinity. South Korea isn't going to "disappear". Not unless its northern neighbor decides to nuke it. But it is going to have to figure out what to do with a population that consists of many old people and few young people. Maybe it'll be just fine, if it has sufficient automation to support its elderly and produce enough wealth. Or maybe it'll have a crisis where there just aren't enough people around to do the work. That seems considerably more worth talking about than talking about a curve that asymptotically approaches zero.