I too actually bothered to read the article.

Cortana is trash. Bing's AI isn't perfect, but at least it's not afraid to say "I don't know", instead of hallucinating some made up bullshit every single time. I mean it still does it, but not nearly as often and you can always check the sources it provides to confirm.

It would be a lot better if it used Google search instead of Bing, however. Often times it can't find the answer that a Google search can. That merger will never happen, though.