The Audience stays the same, but the Show changed. E3 was a trade show for developers, actual journalists, and the gamurz. Journalists decided to make politics fashionable for the world of gaming and so it did.
E3 banned Booth Babes when their core audience was males. E3 tightened up on what was going on behind the doors with the groupies. Technology and games stopped being revolutionary or edge and now it's safe. No more actual gaming icons, we need celebrities and influencers.
This is the result of the mainstream industry adapting to SafeGaming only. SafeGaming isn't appealing to enthusiasts, just AAA gamers who continue to get taken for a ride.
VGA is going to die when their politics decide to change, leaving their current audience behind. Always happens.