I don't think we have enough civil sim post volume to need separate subforums IMHO.
Also the few of us who fly other stuff (XP10, Flight) still continue to use FSX.
It is actually nice that SimHQ is one of the few flight sim forums where users of FSX, Flight, X-Plane can all co-exist in the same subforum and discuss things in a decent manner without the conversation turning into a religious war.
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