Even AJ of Southfield Audio was running snakeoil cables and if you know AJ that is a MAJOR inconsistency. LOLAs you know, I have a thing for consistency.
But like Amir mentioned above, and exactly what AJ said to me at the show, you have to use them if you want your gear to be taken seriously.
Almost the same situation with vinyl, there were few displays that were digital only.
I could hear a room review by Mikey F. now,
"Vendor X had a wonderful hardware kit in their room but unfortunately there was a lot of nasty glare and hardness from his digital only front end. Add in the many avoidable layers of heavy veiling introduced do to poor choices of cabling, both in interconnects and power lines. These vendors need to realize if you bring in over $800,000 in source, amplification electronics, and speakers, you have to provide appropriate levels of cabling in the neighborhood of 25% or more. "