@big_greg
I disagree with the following statement:
A regular CD in a good player or transport/DAC will sound better than a SACD in an Oppo or entry level player
Sony and Philips 25 years ago introduced the SACD format, expecting it to replace CDs which they also co-invented.
DSD is much simpler to play back than PCM, and has much higher resolution than Redbook PCM.
I do not know why SACD was so poorly received in most markets, but my guess is poor marketing. It must be hard to improve on the "perfect sound forever" pitch which almost wiped out LPs.
If you find multi-channel unrealistic, my guess is you do not play much classical music. In a concert hall, much of the sound we hear is reflected and it is the subtle hall sounds that add an extra tad of realism, if the recording engineer so chooses!