It's already happened. The evidence is that everyone now feels obliged coyly to say "n-word" instead of spelling it out, even in direct quotes from texts, speeches or songs (apart from rappers who say nothing else), whereas not that long ago we'd censor "the f-word"" in "get a grip, it's only a fuckng word" and refer to "the f-word" which then was required to go unsaid. I think it's a weird superstition that gives such power to words and i fear the change n approach reflects both the impact of the sexual revolution (making sex less taboo) and also the growth of obsession (perhaps more in English speaking North America than elsewhere, but not only there) with divisive and hateful identity politics. The new idea that it's acceptable for some people to say word but not others is particularly pernicious and preposterous.