Medical advances too - drugs and procedures that didn't exist 10 or 20 years ago are commonplace along elderly populations now, a trend that will no doubt continue. Attitudes and regulations around euthanasia will inevitably change too. Personally I'm not worried my final years are going to be of significantly diminished quality of life compared to what my own parents have experienced. I might not be so sure of that if I lived in a country like South Korea or Italy, mind you.