We've already seen this happen in the land of cuneiform. In the first millennium BCE, Akkadian cuneiform on tablets was replaced by Aramaic written on papyrus and vellum. The cuneiform survives in large quantity, the Aramaic barely at all. The Story of Aḥiqar, for example, comes from Mesopotamia and the only copy that survives in the original language somehow found its way to Elephantine in Egypt where the climate allowed it to (barely) survive. It puts Assyriologists in a weird position where there's plenty of textual documentation of earlier eras but far, far less in later eras. We're left with odd situations like the best documentation we have of Nebuchadnezzar II's reign coming from the Bible because the Bible got copied and the Babylonian texts that might provide a different emic perspective did not.