For me personally, that might actually be a counterexample to Betteridge's law. I'd love to have a chance to fuse with other people, if only for a short time.
I think the entire point of the article is that it may not be temporary. If the connection between the two minds has enough bandwidth they will become one and at best only one of them will still exist. The consciousness of the other person will be for all intents and purposes gone.
It would make sense to me if both parties experienced the same thing while connected, and when seperated afterwards, contain partial memories of the experience (since memories seem to be distributed throughout the brain, they would be distributed throughout the super brain, leaving only partial fragments to any one part). I bet the individual brains would have different stories to explain the previous connected experience, due to the different memory fragments they have access to.
That's a strange extrapolation. I'd rather assume that neither will survive the transition, and a new personality will result. At best. Which is not so bad, if the new one is better than both that came before.
It's an example because the question asked is an obviously and inherently sarcastic one. Betteridge's law's default answer only applies to questions that at least appear to be earnest, and inverts on sarcasm.