But who will replace them? You may find a "new" generation more amenable to the glitz and glitter, but time takes its toll. Does your mother stand and scream throughout the game?
Again, the number of students and younger, rabid, vocal, standing fans who can afford the price of tickets, travel, lodging and dining falls far short of filling the stadium. Should the seating capacity of the stadium be increased do you envision that there will also be a filtering algorithm that separates standers from sitters to assign seats? What might the metric be between fans standing, clapping and yelling continuously and fans sitting, clapping and yelling as need be; as appropriate.
Hell, why not install Laz-E-Boy stand assist chairs, remotely controlled, throughout the stadium. I suspect that there are fewer "down-in-fronters" than anecdotally reported here.