Tvad...A few decades ago I messed around with various forms of "derived" multichannel, including some circuitry of my own design. In general I agree with you that the typical stereo recording doesn't work well in full surround.
However, some particular recordings do work very well. Few recordings are made with just two mics. There is usually an ambience mic at the back of the hall, and when its signal is mixed in out-of-phase between the two channels it will, upon playback, emerge from the rear, exactly where it belongs. One Judy Collins cut, "Amazing Grace" is exceptional. She sings in a church, at first solo, but then the congregation comes in all around you. At the end, as the sound decays you can hear people behind you putting their Hymnals back into the wooden racks! Spooky!
But usually four channels from two is overreach. However, three from two (center) always works well. I play stereo material that way on my multichannel system. I have used a center channel for about forty years using various ways to derive it.
Now, for true multichannel, I have some recordings of classical chamber music where each channel has one instrument isolated in it. When you play back such a recording you are not "transported" to the studio, but rather the performers are transported to your listing room. The realism is amazing.
However, some particular recordings do work very well. Few recordings are made with just two mics. There is usually an ambience mic at the back of the hall, and when its signal is mixed in out-of-phase between the two channels it will, upon playback, emerge from the rear, exactly where it belongs. One Judy Collins cut, "Amazing Grace" is exceptional. She sings in a church, at first solo, but then the congregation comes in all around you. At the end, as the sound decays you can hear people behind you putting their Hymnals back into the wooden racks! Spooky!
But usually four channels from two is overreach. However, three from two (center) always works well. I play stereo material that way on my multichannel system. I have used a center channel for about forty years using various ways to derive it.
Now, for true multichannel, I have some recordings of classical chamber music where each channel has one instrument isolated in it. When you play back such a recording you are not "transported" to the studio, but rather the performers are transported to your listing room. The realism is amazing.