From the article:

> I was midway through explaining a concept he hadn’t covered when he stopped me. He pointed out that my way of speaking had completely changed and how it was unusually structured and didn’t give him the opportunity to ask follow up questions.

IMHO this sounds like a bit of an exaggeration in service of a specific narrative for the blog post, but language convergence has been a topic of conversation ever since the earliest autocomplete features appeared on smartphones.

The feedback loop in this situation is (LLM trains on people <-> People then train on LLMs).