CDw,
I haven't called you a liar at any time. Also, I have extensive experience with MC for music as a discrete endeavor from MC for HT. My comments on this have been in the realm of MC for music, this being AUDIOgon rather than VIDEOgon.
Economically, MC is about movies, as movies are the hook the entire industry's marketing machine is using to entice people into MC. The music side of it is a sideshow economically, however. Just face that fact. Nevertheless, the movie aspect of MC is not the framing of *my* answer to your original question. I am giving you an undiluted music reproduction perspective. And by the way, YOU posed the question. Don't protest that you don't like the answer!
I have heard music MC correctly. It is not an advance in fidelity, IMO. I've probably heard more diverse and correct music MC installations than 99.99% of people who have heard MC of any type. It's not a scheme for convincing fidelity, in my view, but I do understand why some people are seduced by it and enjoy it. That's OK. Do what you want.
20.2, 20.1, 10.2, 10.1, 7.2, 7.1, 5.2, 5.1, 3 channel, 2 channel SRS, SACD MC, DVD-Audio, yadda yadda yadda, none of these schemes in expert configuration are unfamiliar to me. It's plainly reaching to say that MC is no more complex than stereo. I can assure you, I have heard what you're talking about, and my reaction to it is it's worse in every elemental way for music fidelity, than 2 carefully chosen and configured channels. Especially when you stipulate level cost. That doesn't mean I won't continue to be curious and listen for some future iteration of MC when someone gets it right. Today is just not that day.
Phil