The main thing that Paul missed in his video was the fact that a good multich rig can do anything that a good 2 channel rig can do. Don't like the sound of a particular multich recording, play the stereo version and shut off any upsampling.Here's the original article - and YouTube Video - by Paul McGowan on "Why Stereo vs. Surround?"
The reverse is not true, if you only have 2 channels, that's what your locked into, the mediocrity of stereo reproduction.