The newer sensors used in the Scarlet and Epic cameras (those are the ones we are talking about, right?) haven't been proven or tested.
… all of which is fine. However …
I am treating these cameras as if they are products that do not currently exist, or have any published white papers on. And that is what they are.
… if this were Nikon, Canon, Leaf, Leica or Hasselblad, people wouldn't approach a newly announced product in the same way, they wouldn't say `oh, we don't know anything at all about this new sensor/camera, we can't know that it will be any good.' You're dismissing their announced products out of hand. If these companies announce a new product, it should (and mostly is) taken seriously. I think RED deserves some more credit here, that's all.
The OP is particularly enthusiastic about the system's modularity (which medium format manufacturers seem to have abandoned), not just about the brains. And yes, this is something the other manufacturers don't offer (for digital cameras, mind you). The OP has a large format camera already, so I assume he knows what he wants in his new camera (whatever he may end up choosing).
To be honest, I see Canon's move to integrate the ability to make movies into their new cameras as a reaction to RED's announcement. (Nikon has included this only in a consumer-class camera, so it remains to be seen if it is adopted across its dslr line-up in the futre, particularly in pro bodies. Canon's move took me by more surprise here: there is no real reason to include a shoddy movie mode into a pro body, it's not going to be a feature serious amateurs and professionals have been asking for.)
So the Scarlet 2/3, with it's fixed 8x lens, can accept Canon or Nikon lenses?
Are you trying to twist my words until something right comes out of it? I was responding to your claim that RED's announced brains (the ones this thread is about) cannot mount Nikon and Canon lenses. This is false, they can.