I don't think age is an issue, because people with older number of age still maintained well their health so well that they still able to do their everyday life things. Well, if the elders think positively and have a good mental and physical health, i dont think those people should be called as old. Besides, it is quite an insult to call people old, no matter how much grey hair they have, how much wrinkles on their face.
We dont call people old, but we celebrate them to have longer age and life because they still live until now, its quite a fortunate thing to have them live this long. Of course, I do wish everyone here to live long well, maintaining a healthy life is till a great choice.