Night Owl,
See my PM.
Thanks for your previous service. Age plays a part only so far as the individual wants it to, except that in the very highly stressed jobs there is a duty of care issue once people get into the heart attack zone - loosely defined as over about 63, based on experience in recent years!
Display line restrictions haven't changed much over the last three shows, but airspace has changed dramatically. WRT the litigious aspects, I would take the view that most of recent change in the regulatory sense is more aligned with user-pays than with the tendency to sue - in this country, anyway. However, we must always have in mind the consequences of lack of care!
Cheers
Gru