Probably has more to do with wealthy access to the best medical care/prevention. As for being 'with it' I'm sure having a wife 27yrs younger helps. Plus he alre

Probably has more to do with wealthy access to the best medical care/prevention. As for being 'with it' I'm sure having a wife 27yrs younger helps. Plus he already had a handheld device in the 1960s so second nature to him :P