Digital Amplifier Company aka Cherry Amplifier ...

When buying from a manufacturer, you may have a greater risk of not being able to repair if the shop closes. The key in that is "may." How many large manufacturers support their gear for many years? Some do, some don't, and one never knows when a firm -- small or large -- might close or change management.

Regarding DAC's products, I've not heard them. That is how I'd judge. That, and, after reading some of the designer's comments on AudioCircle, I was impressed at how based he is in the factual world, not the audiophile world of magic cables and quantum effects; and at the same time, people rave about the sound of his amps. (Well, there's someone to rave about anything, but better that than complaints!)

His amps are "alternative versions" of those made by another manufacturer in the same sense that an Audio by Van Alstine amp is an "alternative version" of a Bryston or Classe. Same basic technology, but different implementations.

We all know the risks. I’m not the least bit worried about Tommy O.. 
A friend is planning on buying an amp from Tommy, so hopefully I can help break it in for him.  :)

My first priority is probably the Music Reference RM-10mk2. Everything has been delayed because of virus, but hopefully things are getting back to normal 

Very interesting company. I love their Demo routine. More manufacturers should do this. The Old TACT amplifiers were a very high frequency PWM design running at 90 mHz. Driving dynamic speakers they were excellent. Not so hot on ESLs. So, I do believe a switching amp can be made to sound excellent. Most do not. Certainly an amp of that power if decent sounding at this price would be a great value. If it sounded as good as say a Parasound JC 1 it would be an unbelievable value.
The only thing that bothers me is that this company has been around for a while and they have not gotten much traction. Why. If they are that good they need a much better marketing plan.

The TacT amplifiers with <500KHz PWM.

I get the impression from what the owner has written that it is a lifestyle business. It is self-sustaining and it pays his bills. Not everyone dreams of being a tycoon. Home audio is a diverse enough business that "grow or die" does not apply depending on where you place yourself.