How much has changed in the past 30 years? A fair bit, if that is any indication, but a person from 1991 watching a game today would recognize it as CFB with some additional rules. Most of the changes were away from the game itself. How many fans are fairly casual fans? They buy season tickets and TG each home game but don't follow the intricacies that closely?
I also wonder how many Big Donors barely watch the games anyway. Dunno. I've been to Superbowl parties where 20 folks were schoozing and 3 watched the game, I realize that is very different.