I would hate to see it split by brand or which ocean they crossed. Granted the manufacturers have already made that split with entirely different schools of thought on what a dual sport should be. But people like me that have switched to Euro also have decades of experience on Japanese. Not to mention how many of us own both.
If you split off tire questions it would probably cut the post count by a solid 10%. Therefore I would lean towards a split along the lines of bikes and stuff, parts or gear or something. I don't know how to name it. But I really would not want to see bikes broken out into separate groups.
A man who can laugh, if only at himself, is never really miserable.