Most of what was considered "political correctness" twenty years ago is just politeness today. It's the common sense of the culture, which is not necessarily that people have internalised its values (although I think for most people born after 1985, that is the case to a greater or lesser extent), but that it is the understood standard of conduct in polite contexts. People who still rail against "PC culture" in the traditional sense are, bluntly, vulgarians, the equivalent of people who want to take about sex and excrement at the dinner table. There's a reason that most of the "anti-SJWs" who fall into that post-1985 generation are also pretty vulgar people in general, at least online.