alt Hacker NewsThe 404s mean that somebody or something checked if the post at the URL existed, and got a clear answer. Seems like it's good that they checked, at least. You won't see any evidence of the ones who don't check.
Also, I imagine keeping their cars out of Chinese New Year celebrations (and other big events) is something Waymo could figure out how to do if they put their minds to it.
The checker could be, perhaps is likely to be, the reader of an article clicking a link the LLM hallucinated when it wrote the article.