You're right. But this article contains significant new information (SNI) about Excel, and spreadsheet topics are perennially interesting to HN readers, so this is the rare case where a quick follow-up article, and also the title change, probably makes sense. Usually it goes the other way of course:
https://hn.algolia.com/?query=follow-up%20by%3Adang&dateRang...
https://hn.algolia.com/?query=%22significant%20new%20informa...