I'm just curious as to why the item limit is only 15.
TB can handle it, obviously, from scripts such as atmospheres. Atmostpheres can create up to 300 objects that appear solid but are only visual "props."
It seems that if TB has the capability for that, it would have the capability to have more solid objects as well.
Is there something I'm missing that also contributes to this limit?

Actually it's 16 but I do think I know what the problem is.

Object's that aren't static - when too many collide at once the physics become very complicated, I guess that it would crash most computers. I actually think it should be higher though but I'll save that for the suggestions board.

They could put a limit onto non-static objects, no? A maximum of 16 non-static, and perhaps another 10 static. That way, nearly every computer could handle it.
Does that sound reasonable?