It's things like "perfectly invisible in code review, happy to pass CI a thousand times, then lock your system up at 3am under a request pattern that no one anticipated." which are a dead tell it was written by ChatGPT

I'll bet you 2 beers the LLM you used to proofread the post was indeed ChatGPT.

That's exactly the problem. It sounds like one aggregate person. It's quite unpleasant to read the same turns of phrase again and again and again, especially when it means that the author copped out of writing it themselves.

In fairness I think in this case they mostly did write it themselves.

The closest actually human style to LLM writing is obnoxious marketing speak. So that also sucks.

So many people who are not great writers lean on LLMs to write, but aren't good enough to see how bad it is. They should be criticised for this. Either use them and be good enough to make it read as human, or just don't use them. No free lunch.

Email the mods about it rather than replying, subject “Accusation of AI in FP comment” or whatever. It’s a guidelines violation to make the accusation in a comment rather than to them by email, and they have tools to deal with it!