I was thinking the same thing. What of black swan events? They (the authors of this study) might be right for the next ten years then, BSE... we gain another 30 years on average.
But as far as I know, such a BSE has never happened in medicine. There have been many developments that have reduced mortality for people below the maximum lifetime, but there has never been a medical breakthrough which dramatically increased the longevity of the very oldest people. If something is developed that allows us to have as many 130 year old people as we now have 100 year old people, it will be qualitatively different than anything that came before.
