Buddy Guy was at that same one-day blues festival in Dallas where I saw BB. I still think of him as a "young guy". I guess the oldest blues guys I ever saw were Pinetop Perkins and Papa John Creach. Yeah, it would have been great to have seen guys like Skip James, Sonny & Terry, Son House, etc., etc., etc. And going WAY back, Charley Patton and Robert Johnson. My favorite old blues recording is Blind Willie Johnson's "Dark Was the Night, Cold Was the Ground" (actually, I guess that's really a gospel tune.)