Class D amps seem poised to take over. Then what?

You are correct.

Also to date they do stand apart design wise Merrill does also atmosphere from what i'm reading has spent many hours designing their Class D offering which i'm sure will be a great sounding amp.

But in the end it's the SQ, one can have the best parts but if you do not know how to maximize what you have best parts means little.

You know as i do from experience and living with the AGD's that they are great sounding, Alberto has taken advantage of what he has at his disposal. It does not take long after talking to him that he is the real deal and a very intelligent person when it comes to design and parts implementation. His upper end amps have a clear cover so one can see his design also in the so called tubes. He is very proud and deservedly so of his creations.

Some talk negative about the amps but do they have any experience with them? It's like me telling you how your care drives even though i have never been in the make or model, it also takes time to familiar yourself with a product to maximize it's potential.

It amazes me how some can form an opinion out of the air.

It amazes me how someone can say a Class-D like the AGD has no limitations into one of the hardest know speakers to drive, and for it to sound it's best.

No amplifier can double it's wattage when impedence is halved.

They can come close if good, like the BJT ones I mentioned.,
Where many Class-D go backwards! instead of trying to double, if independently measured into 2ohm from the 4ohm wattage, that shows just how current limited they are.

Everyone has an opinion - which is good - not everyone agrees with another persons opinion -  you all know my opinion on this subject matter.

Happy Listening.