How can you not have multichannel system

Here is another sacd article where the reviewer lists her favorite 2 channel and multichannel sacds. Along the way she sheds some light, but not right on the nose. Worthwile if you want to try a few discs, even if 2 channel.

Oops, here is the site
http://www.positive-feedback.com/Issue39/sacd.htm

For the technical or engineer, a schematic:
http://www.sonicstudio.com/pdf/dsd/SACD_FormatOverview.pdf

realistic timbre has yet to be attained in any stereo system. isn't truth in timbre the essence of music ? isn't the sound of an instrument more important than where it comes from ?

evn if if i have frequency perception loss above 12khz, i can still recognize a tenor sax. i want a tenor not to sound like an alto. one channel is sufficient for that purpose.