In all seriousness, I wonder if we're most influenced by the people we actually game with. Especially back in the old days, pre-internet, D&D players were a fairly fragmented bunch in my experience. Outside of our immediate group, many of us only interacted with RPGs through publications like Dragon or on the rare occasion we might hit up a game convention. At least in the Dallas area, I didn't even see a game store that had space for people to play games until the late 1990s.
But then I would have also been heavily influenced by movies like Excaliber, The Sword and the Sorcerer, Conan, Beastmaster, Krull, etc., etc. I expect people in their 30s would be heavily influenced by Dragon Ball, Harry Potter, and whatever other skibidi things young people like. Even if it isn't necessarily in the DNA of D&D (yet), it might still influence how the game is played.