From my perspective, I'd prefer to keep it all in one place. There sure seems to be a lot of kayakers who don't want to see raft posts, or vice versa....
And, by the way, there are self-support SUP paddlers.
But IMO, at least for myself, I want to see it all. Sweet TR from mexico, first D's and waterfalls? Yeah, I wanna see that. Recent beta? Want it. Gear tips? Want it. ELF MFS post season? Hit me! Packraft/bikepack trip? hell yeah!
I do about everything but hardshell, and there's just no way all my rafting knowledge has come only from rafters. There's no way my kayaking skills have come only from hardshellers. Rigging tips, safety, beta, gear, etc .... how do you categorize this? When I ask a PFD question, it's likely I'll use that PFD in both craft -- do I post 2 threads now?
I'd rather see all the posts, and pick the ones I'm interested in, rather than have to check out 4 different forums. I would hate to be confined to just one boat, because what the the river says is heard differently by each craft. So we learn different aspects of the river from different boats, but it's all a continuum of experience.
Here's a shot from my last trip. Now, I hiked this gear in 10 miles. Where's the backpacker forum? I'm packing like a rafter, but I'm definitely creeking. I'm using skills from what, six disciplines? Where do I post?
If I had a packraft, would that also be a separate forum? Is it boating gear or hiking gear?