High End Amp Price Collapse musings

As Class D advances it will eat into the high end class A market.

Not yet advanced enough for me.  I tried but found out the hard way and have returned to big Class A iron, like Bilbo Baggins, "There and Back Again."

It seems that the people critical of Class D amps haven’t given them a fair shake/listen

I can only speak to my specific experiences, as can any of us. However, as I have posted previously, I did give the Acoustic Imagery Atsah, Ncore, NC1200 monoblock amplifiers a fair shake, since I purchased them, owned them, played them in my system for over a year, and during that time period compared them head-to-head with three other really good amps, two of which I still own. It was amplifier roulette for awhile and I surprisingly learned that, sort of like Dorothy, I had actually started with my ideal amplifier several years earlier but just didn’t realize it. Since I had sold those original amps (to a buyer who enjoys them to this day) I was fortunate to find another pair and even more fortunate that Wilson Shen with Clayton Audio was still around to fully upgrade them so they sound awesome. Any of us who post here are speaking to our own experiences, systems, rooms, biases, etc., which is why anybody trying to find universal truth on these forums will eventually be disappointed.

Clayton M300, 300/600 wpc into 8/4 ohms in Class A.  Yes, they get hot but they have high/low bias, which helps.  I quit sweating the small stuff, like warm-up time because it is all relative, since they sound so good from the time I turn them on...they just sound better after 30 minutes.
Others in the rotation were Lamm M1.2 Reference, the NC1200 Atsahs, and a McCormack DNA-2 LAE designed by David Reich, with full upgrades by Steve McCormack at SMc Audio in 2014.  I still own the DNA-2 and the Claytons.

I haven't read a D-basher here yet that mentions which high end Class D amps they've listened to that pale in comparison to their Class A or A/B amps.

Then you should go back and read the whole thread.  While some have made blanket statements about Class D or Class A or AB, others have indeed cited specific examples. Read my post from  02-07-2017 at 10:30pm for one example.  However, I didn't bash the Class D amplifier (which actually sounded quite good in many respects) and I didn't say it "paled in comparison" but simply that I liked the Class A amps better.  
So much of what we hear is affected by listener preferences, the type of music played, the room, and the ancillary equipment that most attempts at gross generalities or blanket statements do nothing more than incite an endless loop of rebuttals.