I have to say it's remarkable that the moderators and administrators can't follow Macrumor's own rules and guidelines and seem to think the rules don't apply to themselves. It certainly hurts the credibility and creates confusion, frustration, disappointment and distrust.
By your own rules and definitions "the duplicate thread rule applies to all threads" and "Threads that duplicate what's being discussed are always closed". Since that rule seems to be strictly followed it means the
news thread is the one that should be locked. The
locked thread about the new leaked benchmarks was in fact created one day
before the news thread, thanks to a forum member being quicker than MR staff at finding and reporting the news. The news thread is per definition a ”confusing” duplicate and "something we want to avoid here" and since the rule applies to all threads it should be locked.
Since you have to report such news after all the right solution would be to
not lock an older thread about the same/similar topic/news just because you’re late to the party and show more respect and give some credit to community members who contribute to this forum in a positive way and help to create more traffic to the site. I wouldn't be surprised if the locked thread in fact was the reason MR found out about the new benchmarks. Last time MR had a tweet as the news source for the first leaked benchmarks but this time there is no source, only a direct link to Geekbench and the news was reported the day after it was posted in the discussion forum.
As it’s already been stated everyone also knows that news threads are not only often filled with shallow comments but they die out fast since the news discussion thread is filled with lots of new daily discussions and it’s harder to find a topic there. There are forum members who have turned commenting to an art form by posting one-liners only in the news discussions and never get involved in real discussions elsewhere. Real deep discussions happens in the dedicated threads. It’s pretty simple logic. If I want to discuss or read about Apple Silicon I go to
”Apple Silicon (Arm) Macs" thread, not to the News thread because the news thread is not categorized like the rest of the forum and as we all know news get old pretty fast.
Another question is what if someone creates a thread about an old news after a week or a month or even later? Are you still going to lock it and redirect everyone to an old dead news thread from several weeks or months ago? Or are you going to lock the old news thread and redirect everyone to the new active discussion? Is there a time limit for which old news threads can be revived or how long it should pass before we're allowed to create our own similar discussions about news articles? I hope in the future you follow your own rules and apply them to your own threads too but maybe as you say "This is how we do it on this site."