Was at his concert in KW in February. He looked decent for his age. His trailer was next to stage. He took a break for about 15mins while the band did some solo stuff. Only unusual thing was that 2 people escorted him on/off stage. Totally supported him. But he stood on his own to play.
I suspect he was roided up to be able to play. The last concert was in May, probably took all of his strength to do it.