IMO we need to make an important distinction between "sound reinforcement" and "home playback" systems. There are objective metrics that can effectively characterize how well a reinforcement rig "reinforces" sound in a given performance space. OTOH, typical playback in a car or living space is often compromised by the space when we attempt to create an illusion of sound recorded in a different space, and with more than two discrete sound sources.
Stereo has delivered an improved illusion of complex sound spaces, but that illusion is not a linear process. In some cases added distortion improves the illusion while objectively degrading measured accuracy.
IMO it is not apples and apples, so be careful about drawing strong parallels.