If it's so perfected he should go work on some problem that isn't.

High end audio is like a Patek Phillippe or Rolex watch that has a
mechanical movement. Electronic watches that are just as accurate are
available much cheaper so is Rolex a fraud?

The Hafler is an inexpensive, and unexotic amplifier which has been a
workhorse for mid-budget operations and a DIY upgrader's favorite for
years. It works well like (most) all the stuff David Hafler did. But he
was never a high end vendor, he was never a Marantz/Smith/Sequerra or a
McIntosh/Gow or what have you. His products were good value reliable
mid-price products and that's good.

The Bryston is a well built semi-high-end unit that is attractive and
sounds very good. I recently auditioned one and it was a good sounding
amp with no big issues, but a George Kaye MOSCODE unit -which if I
remember began as an evolutionary mod to a Hafler!-definitely sounded
slightly better.

A lot of recording studios have QSCs, but then some have Carvins and
Peaveys too. If all amps sound the same, then I highly recommend the
Peavey CS-400 for low cost and ruggedness. So I guess Crown, QSC and
Bryston are ripoff artists for charging more than our friend, Hartley
Peavey. And Carmine and Vinnie in Escondido.