I'd say it withered due to the opposite trend, which largely focused on a woman being awkwardly hit on in an elevator and complaining about it. It turned out that some of the New Atheists and those they inspired were still European/Christian supremacists, although being atheists they defended it as Judeo-Christian/Western culture, rather than traditional heretic-hunting and Crusading.

It started with Objectivist Michael Shermer, when he started debunking the existence of poverty, racism and sexism rather than quacks and ghosts, was exacerbated after 9/11 when that group (and notably Hitchens) found that they would rather direct invective at brown people overseas than their own parents (it certainly paid more), and the elevator incident simply finalized the Incel tripod, leading into Gamergate.