Hello,
I think we are coming to the core of the problem as I see it: Yes, there is pro equipment that has open digital Mch available, but the consumer does not have that choice. And there are Mch niche products that consumers can find and use but the moment they become too public they seem to disappear.
I agree, it may not be needed at all. I just find it strikingly funny, that the 2channel world is talking about bitperfectness and for Mch we use HDMI.
The real benefit of an open Mch digital architecture would be the avoidance of AVRs and the move towards components, which are then easier to upgrade or supplement.
Again, what makes you thnink bit-perfectness is impossible with HDMI?
Dolby and DTS raw bitstreams require bit-perfect transmission to work. And they work over HDMI.