I am not a professional pilot but a PPL. However I am well over 65 and have only just decided to stop running my own business (sold it) and am now being called on for consultancy work. Also married again 3 years ago and nothing amiss in that department (maybe to the surprise of the youngsters
)
It's not about age, it's about
ability - we all vary in our capabilities and abilities. The decision when we stop should be made, iether by ourselves or by experts (medics etc.) based on that.
People get 'old' at different ages
