Jokes aside, we don't have forums specific to other frame materials like steel or aluminum or
titanium, etc. If you want to discuss riding them, most of the people in Road Cycling are doing that. If you have a question about CF properties, maybe Framebuilders but I don't think we have a lot of "industry" people here. Wrenching on CF bikes would go in Bike Mechanics. Idle chatter about early CF bikes would probably go into C&V or the Early Brifter Bikes section.
Overly-specific subforums tend to have an initial flurry of activity, then peter out. You wouldn't want that, right?