Yeah, so my point was that Mark played superb guitar in 96, and after checking some STP shows, I feel there was a slight decline. But after the accident in 2003, from the 2005 tour onwards, I think his playing got noticeably worse. Gone was the fluidity and dexterity and fire in his playing. It was of course never terrible, but some songs such as Sultans simply became a meandering mess, to my ears at least.
There is the ageing process and his giving priority to songwriting over guitar playing (i.e. lack of practice), of course, but I'm curious how much the accident contributed to this.