Hope I'm not the only one here still using a turntable? I listen to those big black disks in 2-channel usually, unless it's an old "quad" encoded disk. Then I listen in surround.

And, some cds sound better in stereo, to me anyway. Others are mixed for multi-channel and sound best that way, again, to me anyway.

I haven't treated my present room but my last listening room was great for stereo. Back in those days we called it "live end-dead end" treatment and 2-channel was very close to multi. The deal was to deaden the forward walls and leave the back and side walls behind the listener hard and live. Properly done, stereo was amazingly close to the original recording. Come to think of it, I wish I could treat my new room that way but sadly I can't.