Pangram[0] thinks the closing part is AI generated but the opening paragraphs are human. Certainly the closing paragraphs have a bit of an LLM flavor (a header titled "The Pattern", eg)
There are no automated AI detectors that work. False positives and false negatives are both common, and the false positives particularly render them incredibly dangerous to use. Just like LLMs have not actually replaced competent engineers working on real software despite all the hysteria about them doing so, they also can't automate detection, and it is possible to build up stronger heuristics as a human. I am fully confident and would place a large sum of money on this article being LLM-generated if we could verify the bet, but we can't, so you'll just have to take my word for it, or not.