He’s still got it. Voice and guitar. I’m no aficionado so I can’t tell you ‘gee, when he was younger he used to do XYZ in that solo and he doesn’t now’. So he may have retreated a bit. But I sure didn’t notice it.
What the more experienced blues men - musicians in general I suppose - learn is when not to play to leave space. With Clapton’s nerve challenges I’m sure he has as well. BB King is a great example.