Well, you’re not the first person to scoff at a 4 speaker stereo but I am pretty immune to that criticism.
I have enjoyed a 4 speaker stereo for many years in several machinations.
Audiophiles speak of the sweet spot between the speakers as to having a sound stage, pinpointing the instruments. I find the music listening experience equally enjoyable without that effect.
We were all robbed by the music industry when they had the opportunity to embrace quadraphonic sound and trashed it.
When I get this set up... come have a listen.