Is soundstage DEPTH a myth?

Wow, omg, so much being written hear about the subject.

Soundstage is like pornography, when you hear it you just know.

And something not discussed too often, Quality recording is quite important especially on a better more revealing system. Lower level systems are tough to distinguish better recordings on. I know this because I have three systems in my home and each room is different.

It's not a myth, it's an illusion. Intentionally. 

There are some who believe that even with the very best of recordings, the best loudspeakers with the quietest cabinets, the best rooms acoustically speaking, 2 channel audio is at best only able to give limited amount of realism/soundstage depth.

Some, like the physicist/audiophile Dr Edgar Choueri, argue that spatial audio could be the best way forward when it comes to sonically reproduced realism.

After hearing him speak on the Audioholics YouTube channel, I'm tending to agree with him.

Absolutely. But, like in the real world it's defined by the environment around the source and the volume (relative to other sounds) of the source. So, those are the parameters that must be in the original recording or at least engineered to sound that way.  

cd318 - I have the software version of Dr. Choueri's BAACH and that certainly helps in locating the source in the soundstage. I've been intrigued with this concept and have used a Carver Sonic Hologram for many years before the BAACH technology.