I would have to say that the reason that 40 year old music is played is because the main audience of the Superbowl are familiar with this time period. Lets face it, most people older than 30 (as most people watching TV are) are not especially content with the pop movement. So your choices are 40, 30 year old, or new music (We'll skip that whole 80-90's mess
) So we market to the main audience. Unfortunately, there are a few unexpected consequences to using old musicians...
Okay, nobody kill me here, my personal opinion (And I like the Rolling Stones). Maybe somebody else noticed this.
Jagger, and half the rest of the band looked like they might die, right there, if you cheered too loud. Thats what drugs, sex and rock&roll do kids...
__________________
Reading makes a full man, conference a ready man, and writing an exact man.
-Sir Francis Bacon
"Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction."
-Albert Einstein