Wouldn’t multi-channel audio make more sense? Surround sound, quad sound. How can 2-channel ever hope to compete and why should we stay with 2-channel when there’s so much more to be had with surround?
Stereo systems are complex. Their collection of cables and equipment makes sure that every system sounds different for better and for worse than any other system. We learn that the one common thread amongst systems is their synergy between components.