I lost respect for them when they started wrapping class D modules from another company in their fancy case work and charging ridiculous money.
Class D modules are semiconductors made by semiconductor companies like TI and Ice Power.
The job of boutique amp makers is not only an artistic case, but to add a custom Class A input stage and custom power supply.
Why not use the stock input stage and stock power supply that the modules come with? The goal is to generate audiophile distortion harmonics so the Class D amp can mimic the sound of Class A/B.