We live increasingly in a society that encourages and respects the acquisition of knowledge, facts and figures, but has scant regard for wisdom.
Whilst you can acquire knowledge, facts and figures at virtually any adult age, you can't acquire wisdom unless you've several thousand miles on your 'clock'. This probably means that ~ depending on when you started in ATC ~ you're at your prime in the decade +/- 35 to 45, after which increasingly, performance is sustained by a reliance on experience (= wisdom) until inevitably, performance begins to decline after age 50 or-so.
As one O. Wilde once said
"Education is an admirable thing but it is worth remembering from time to time, that very little that is worth knowing can be taught..."
