I have been noticing and pondering this as well.

My only thought is that perhaps, although it was shamed for a while, the people who used it at it's peak have continued to use it in private settings. But now their children are of age that they are comfortable spouting it on the Internet and in person, thus bringing out anyone else who wants to say it, whether just to make people uncomfortable or they grew up with it, or otherwise don't know any better or haven't learned empathy