Or at least, many fewer people. If we get to a point where we're extending the average lifespan by a year every 7 or 8 years, up to an average ceiling of around

Or at least, many fewer people. If we get to a point where we're extending the average lifespan by a year every 7 or 8 years, up to an average ceiling of around 100, that has big implications. Demographic trends can probably predict birth rates decently, but probably not the overall population 50 years into the future.