That rule of thumb doesn’t really contradict anything I’ve said, and a rule of thumb is not to be relied upon anyways. If we want to consider the rule of thumb, just extend the sentence. If the pause would be there, then it would also be there even if the sentence were longer. “System76 AMD-Only Laptop Returns to Market”. I certainly wouldn’t pause between “laptop” and “returns”. But again, a rule of thumb is a general guideline, and it will be wrong in many cases.

The real, specific rules that are listed after also don’t contradict anything I’ve said, as far as I can see. Can you please point to the specific rule on that page that says a comma would be useful here?

A comma does not fix this title.

I’m not claiming to be the single best person in the world at English grammar, but I have tried my best to learn a thing or two about it over the years. I have also tried to clearly explain the relevant grammar to the best of my ability. I have apparently failed to explain it well enough, so I’m done here, since trying more won’t make a difference for such an irrelevant diversion from the main topic.