Gun writers sell new calibers. Who wants to read articles on the same calibers for 40 years? I have read about the same wording in articles for years. Example: Contender articles start out with a brief, sometimes long story, of how the concept of barrel changing started. Then the meat of the article, which is usually the same stuff that Bob and Skeeter wrote about in the 80's. So along comes some new caliber and magazines now have a new product to explore and write about.
BTW - you opened a huge can of worms with this topic, the debate could last for years, with bullet technology so advanced, nobody needs anything bigger than a 9 mm! Lol!