I am not suggesting that you can just throw some GaNs in any old class D module and get great sound. Merrill has a super power supply, has a custom zero feedback circuit, has copper plates inside, is damped, uses great jacks, etc. However, the GaNs themselves are not expensive. What I am saying is that we will have competition real soon from other way less expensive class D amps and maybe even the Van Alstine class AB amps now. By the way, if you tweaked the Van Alstine amps they would sound way, way better. He is no tweak. Just look at the crappy jacks, undamped heatsinks, fuses in line with the speakers, ordinary parts, etc.
Putzy has already released his new module.....check out Purifi-audio.com. Suppose to be sonically way better than the NC1200 used in the Veritas. There will be $3K? amps available in a few months using these modules. No, they do not use GaNs nor are they zero feedback.....but I bet they will be really great. Will they be as good as Merrill? We won't know till a few manufacturers make amps the them and people compare.....months down the road. They certainly will be way, way less expensive......$3K versus $15K or more.
There will be other manufactures using GaNs soon as well. Nuprime is working with GaNs right now.