Thanks, Richard, for initiating this topic. I'm sure it will elicite differing opinions, which I find informative and interesting, as long as people stay civil.
Question: I don't know what you mean when you say, regarding DVD-A:
It is a very difficult if not impossible product to use without a display of some sort
I've never had my TV on while listening to any DVD-A disk. They play the same way CDs do. A display is not needed at all.
still waiting for...a couple of SACD and DVD-Audio disc using different genres of music of the same content recorded and mastered in the original native format for a scientific and conclusive comparison.
I believe "Swing Live" is available in both SACD and DVD-A. It's the only one, that I know of. That doesn't meet all your wishes, but it's a start.
In many cases the same content played back over my Sony via CD actually sounded better in many areas.
I don't dispute there are many poor multi-channel mixes, but your example above may not be a valid comparison. It's hard to compare multi-channel with two-channel and claim one is inherently better, since you are dealing with different mixes.
removing the multichannel capability
That sounds totally artificial to me. You can't make any valid evaluation of a disc if you've changed the original format it was produced for. To me, that is like taking a stereo disk and playing it in mono.
sitting on stage with the musicians was not really the best vantage point even though many multichannel mixes might try to suggest otherwise.
I generally agree, though that could depend on many factors. Imagine if "Dark Side of the Moon" were originally recorded with multi-channel in mind, putting the listener in the middle of the mix! Anyway, muli-channel can provide sonic benefits by placing the listener in the audience, too.
The majority of what has been released started life as a 2 channel product
I completely agree that retrofitting older recordings to multi-channel is not the best use of the format. At the same time, most of that music was recorded on multiple tracks, so it isn't a matter of taking two tracks and making them multi-channel. So there is some hope there, though I agree that newer music recorded with multi-channel in mind should be superior, once the recording engineers learn how to deal with the new format.
I have listened to these albums for the last 30 years in stereo and therefore expect stereo
This shows the inherent prejudice many of us will have when first encountering multi-channel music. I believe this prejudice affects how we listen to new music, too. Have to be careful not to let that affect one's response to multi-channel music.
For either format to succeed, it will have to be developed for mobile use
I don't think this is what you were referring to, but I have heard that some high-end automotive sound systems are beginning to incorporate SACD and/or DVD-A.
Unfortunately much of the general public is focusing on downloadable music these days
This, to me, is the biggest hurdle facing DVD-A and SACD, as well as high-end stereo. A public that is satified with the sound of MP3 is not going to care about high-resolution formats.
Stosh