Re: subforum for hypothetical match ups
A subforum can serve as a quasi-deletion. If there is a bunch of stuff with a common theme, only marginally constructive but not clearly in violation of any guideline, cluttering the general discussion area, you just move it to the appropriate subforum. I am going to guess that's exactly how a number of the other subforums got created. Nobody has any complaint about a deletion but might be miffed at losing the bandwidth of the main forum. That would be just too bad, because they were abusing the general forum trying to get attention. It could also be totally innocent.
This is small potatoes compared to those who compulsively have discussions which compare former players, especially their "GOAT", to current players. To me, the general area should be about the realities of the current tours and current players. We don't need constant squabbles about no one living up to the standard set by some player who is long gone, and no fair H2H possible. Comparing former players to current players sounds like a reasonable concept, until you encounter how obsessive some people are with it and how annoying it becomes for those who don't care to hear how their current favorite will never measure up to someone long since retired, perhaps before their interest in following the sport.
I suggest a "Fantasy Match Ups" subforum, which would include former players versus current players. It would also include "peak" match ups or any hypothetical pairing one could imagine.