Charles Oliveira is a little better technique-wise today than he was when he made his UFC debut in 2010, but not by a significant margin. He’s in better shape now than 12 years ago, but certainly not by a dramatic margin.
The 2010 version of Oliveira had everything needed to win a UFC title, but not only didn’t he do it, he didn’t come close.
The 2022 version of Oliveira holds the title and has overcome so many obstacles to get to the top someone may write a self-help book about it one day.
There is one key difference that has meant the difference between winning and losing, between being good and great, and between being a contender and being a champion.