This brings up the idea that we should be more soft in movements as we get older, think pre-empt and get the hell out of there.
To think we'd spar toe to toe with a guy like your student is a myth. Enjoy the fantasy, but good luck if you ever do that in a confrontation.
Just the absolute truth , I would replace the concept of older however with better
if you are not learning these lessons you are not getting better , you are not confronting your mortality and you are just plain deluded.
Practice stepping 'off line' and stay alive.
if your not learning how to fit blend , avoid , what are you learning , smash everything gets old , you will eventually meet the immovable object or just grind yourself to oblivion , all us old timers (tounge in cheek compared to some of my esteemed colleagues here) should know this. Youth vs experience should be unwinnable if you actually learnt from experience.
But it gets us all I guess.
It's scary how we are starting to think alike over time.

Its refreshing and the only measure , the things that make me take notice are when folks choose different routes and come to the same conclusion ... its a good indicator of truth .
I know I added little , but couldn't help but comment on a very good thread/discussion , thank you.