I'm guessing that Multichannel setup is a bit unfamiliar and inconvenient for many veteran audiophiles. It requires more high quality (forget HTIB) gear and a LOT more work to get it "right". Once you've heard multichannel correctly done, it's hard to go back to 2 channel.
Imagine going to a concert and having to stand just outside the open doorway to listen! That is now how I feel about 2-channel stereo! Don't we want to be IN the concert hall?
Imagine going to a concert and having to stand just outside the open doorway to listen! That is now how I feel about 2-channel stereo! Don't we want to be IN the concert hall?