Those are embarrassing bugs, but they don't prove that LLMs of that time couldn't be effective overall, and they don't mean that the latest LLMs aren't generally very good at coding.

That isn't the premise of the article. Prompting the LLM and walking away (which was clearly done here) isn't yet (or possibly ever) a reality. That includes LLM review. Preventing this would have been trivial: have people smoke test their changes before pushing.