Curious: Why separate A & 100/130/140 forums?

Not complaining, just curious about the new layout for the larger tractor forums.

There are two forums for the larger offsets, one for the A/Super A, and then another for the 100/130/140. How come they're separate when the tractors are so closely related?

I know the 100/130/140 forum gets a LOT of play... Cubs are the "gateway drug" to tractor collecting, and 140's seem to be the popular first foray into "the hard stuff."

If anything, the straight A (not Super A) should be by itself, it's a lot different than the Super A/100/130/140.

Al