My issue is that this conversation is from the perspective that it's only Denon. It's the situation with all brands. They've all gone from 5 channels to 9 or 11 and all suffer from the same limitations that result.
As far as "real" power supplies go, that's something that's evolving, largely...
I find that entire post nearly impossible to believe.
Besides, Denon doesn't even make surround preamps, and back when they did, they never had an 11.2 channel model.