I think Fred sums it up. That is the way I look at people too. I have several "elderly" friends who are in their 60's and 70's because of the abuses they put their bodies through, while I have several "older" friends who are in their 80's and 90's who still have a lot to teach us youngsters.
In just a few years 1990 will be 30 years ago. When I think "30 years ago," I still think 1970.