This is a ridiculous strawman.
> has now been trained on all the natural language that exists on the internet, in order to produce results which are not, in fact, acceptable. And there’s nowhere to go from here: there is no more training data.
Better algorithms and hardware? Also, no one has ever trained anything on "all the natural language which exists on the internet". Only a small (curated) fraction of that is captured in datasets. 45TB of text data was used to train GPT-3.