Why should he retire? Mark still loves what he does. Look how he responds when he sees his studio filled with replicas of his Gibson. And his last album contains some very good tracks. Lights Of Taormina is an wonderful song.
Though, I must admit I wouldn't mind some fresh blood / input in the production team. Hope the next album will be a bit heavier/spicier. Since Chad Cromwell en Chuck Ainlay left the songs got in general softer/slower. Wish Mark would attract guys like Warren Haynes, Derek Trucks, Jerry Douglas, Joe Bonamassa, Bela Fleck, Jeff Beck and Chris Rea to spice up some things on his next album.
Joe Bonamassa - Just Got Paid
Midnight In Harlem - Derek Trucks and Susan Tedeschi
Dave Matthews Band feat Warren Haynes - Cortez The Killer