He's only 31...but still I wih he had done this when he came to the UFC. I feel like he had his run.
Age doesn't matter in his case, but the years active as a pro. It's his 11th year now. We had a thread here were someone calculated the stats and on average most fighters decline significantly after 9 years of pro MMA. And in particular the Chute Boxe style of fighting isn't really health keeping.