I first played D&D in 1986, when it was still 1E. 5E is the most mainstream I have seen D&D. Parents are actually happy to have their kids play D&D these days instead of being glued to their phones/tablets all the time. Quite a contrast from the satanic panic that marked the 1980s when I was a child/preteen. And I do think all the 5E livestreams (sometimes with celebrities) played a role in mainstreaming the game. Vin Diesel, Joe Manganiello, Deborah Ann Woll and others I think helped change stereotypes about D&D players. The rules have been simplified and the player base looks the most diverse it ever has.