"Not to mention Class D is most efficient and runs cooler so you save on power bills" Can you save on your heating bill with Class A? (just kidding)
2) I wonder if some of these effete HEA manufacturers use price as as way to convey quality rather than cost of production. I can't imagine some manufacturers pricing a monoblock at $1999 even if they could easily make a profit. It would put them among the unwashed lower classes and damage their image. But maybe I'm getting too cynical.
3) I used to buy radiology equipment for hospitals. Anything I spent $35,000 for would have way more components, more expensive components and involve way more labor and R&D than could possibly be put into any amp. They are sold to a very limited market and have to be FDA approved, which costs many times more than RFI certification. But maybe I'm too cynical.
4th and most relevant) I am a big fan of Class D and fervently hope that I will have the opportunity to hear a GaN based Class D product that I can afford soon.