It would be even nicer if he addressed how his product differed from competing class d amps in performance and what a consumer gets with his product that justifies the price of 3-4 times that of competing products.
Because it costs money to build a better mousetrap. If people like their off the shelf Hypex or Purifi based class d amps then they need not look for a superior sounding amplifier. They found their version of great. There's also a four plus decade track record of excellence which also means service after the sale, a good living for those who work there, etc.