Not sure what you mean?

That this kind of writing "The blog ends there. No sign-off, no “thanks for reading.”" has tell-tale AI mannerisms

If you mean "The extremely modern style of voice used to provide contrast between the anachronistic end of the story and the review of the same is how LLMs also sound" the I agree. That style voice is, after all, exactly what most of the training content major LLMs are trained on will use.

If you mean "the usage of that voice implies the article itself is written by LLMs" then I strongly disagree. I'd eat my shoe if an article written this well were made by today's LLMs. Doubly so for an article from a linguistics PhD who was written similar content prior to LLMs.

ironically, I think there's an epidemic of ai bots accusing everything of being ai-written here on hn