When I started work in 1974, many of the old boys had been on the railways for 40+ years. It was not uncommon when they retired at 65 to last only a couple of years and then shuffle off of this mortal coil. A couple of them actually died before the pension came through.
These days with better housing, diet, lifestyles and generally better healthcare 70 years old is not that old.
My Dad, a D day veteran lived well until he got to about 88, then vascular dementia took hold, and the last 4 years were not good for him.
I don't mind living to a ripe age if I have my health and are mobile, on my own means.
I'm 63 at the moment.
I will have a DNR put in place if and when my health and faculties start to fail, and hopefully assisted euthanasia will be available by then.