But lets walk back your statement I don’t think it is universally accepted that maestros perceive and direct music even better with age. I think you will find that statement hard to support. I think what you will find, is that the best conductors, are the best, no matter what age they are at. The remaining conductors at an advanced age are remaining, not because they are better with age, but because they are better period, and always have been. Did know there are studies into how long conductors live. They seem to have long average lives.
I must say that this dont demolish my point but i recognize the validity of your remark indeed...
Then i will declare a win/win for each...
For sure even Maestros decline like all of us...
My point is they are recognized for their musical perception learned ability not for their frequencies range perception "per se".... 😊
Like you said they stay there because they are always the best not ONLY by habit.... I listen to an hour with Maestro Ansermet directing practice with his orchestra.... At 80 years old the old dog was barking with very articulated speech directives and accurate perception....
It is in french tough sorry....
https://www.youtube.com/watch?v=Naxj8XbT8Q0