That would mean the concept of "literality" no longer exists, but you just used it, (I'm taking your words literally, to mean that you believe "literal" now means "figurative" in perpetuity) so it must still exist. I also just used it, so even if you meant "literally" figuratively, the literal definition still exists, because I just used it.

You see why we can't just say "oh welp words change" now? They do but also if nothing has meaning just stop speaking languages at this point because they're, well, meaningless.

Hell I'll give you another popular example, you ever watched South Park? You remember the biker episode? They argue the same thing you do here, that words change meaning, but about a different word (and with a better case for it, no less). You wanna defend the evolved use of that word publicly here right now?