Yes it was - thanks for posting it. While the author makes a strong argument for mono in this article, he/she leaves out any consideration of phase cancellation in summed audio outputs from stereo instruments like keyboards. They also don't discuss something I call the "mono myth" - no band is truly able to perform in mono unless they are all vertically piled on one another. Just by the natural arrangement of the instruments on stage, be it a small band or an orchestra and especially the latter, there is a natural stereo audio spread. The acoustics of the room then reflect those sounds and blend them.

We all have two ears, not to belittle anyone with trouble hearing, and the only natural way for us to hear the exact same thing in both ears is for a single sound source to be coming from straight ahead, directly overhead, or directly behind the listener. Otherwise we listen for two distinctly different sounds, which is probably why our ears are on either side of our head instead of being planted on the front of our heads like our eyes. So I would argue that stereo sound is the most natural way for us to listen to music because it's the most natural way for it to be presented. As a one-man-band I'm aware that I am being compared to traditional bands when I perform, so I want the most natural and comparable sound possible. My keyboard sounds best in stereo so that's the way I've chosen to amplify it - if my competition chooses to perform in mono (they often do) then so much the better for me.