The problem with this line of argument is that LLMs are not new technology, rather they are the latest evolution of statistical language modelling, a technology that we've had at least since Shannon's time [1]. We are way, way past the telegraph era, and well into the age of large telephony switches handling millions of calls a second.
Does that mean we've reached the end of the curve? Personally, I have no idea, but if you're going to argue we're at the beginning of things, that's just not right.
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[1] In "A Mathematical Theory of Communication", where he introduces what we today know as information theory, Shannon gives as an example of an application a process that generates a string of words in natural English according to the probability of the next letter in a word, or the next word in a sentence. See Section 3 "The Series of Approximations to English":
https://people.math.harvard.edu/~ctm/home/text/others/shanno...
Note: Published 1948.