Every fighter evolves in each fight. He's not the exception. He's still evolving. After all these fights as you say we can always expect to see the same version or at least kind of like the same things in his fighting style.
I realized this when I turned 50. I had worked in one of Washington, D.C.'s largest law firms, enjoyed a political appointment in the US Justice Department, was married to a well-to-do attorney, took lavish vacations, and belonged to a country club. But I felt empty.
"Male OB/GYN in my 30s from Europe here. Several reasons, but maybe the most important and formative experience for me was when, after med school, I was living in the Horn of Africa for a couple of years."