There is three level of quality design/price ratio if i symplify for the sake of my arguments...Low, mid and high end S.Q./price ratio....
Most of the times if we stay on one level for comparison , differences between two amplifiers will exist but will not be so significant and big as compared to what will give money placed in mechanical, electrical and acoustical embeddings controls...
Then it will be a disservice to audio consumers to encourage them to upgrade instead of adressing the way they install an amplifier in their system/room/house...
It is there that the difference in REAL improvement will be huge... Not just only a flavor taste difference about this 10,000 bucks amplifier and this 15,000 bucks one...
Then before accusing him of misleading people perhaps we must think twice...
Informing people sometimes is saying to them what they dont want to hear: buying costly piece of gear and listening to them is not enough to create an audiophile experience even if the difference between a 10,000 bucks amplifier and a 25,000 one can exist indeed...
Upgrade sometimes even from mid to high end cannot replace acoustic for example...
Audiophile experience is less a question about money than about knowledge...
At the time he was the best source of information about audio gear but he did his listeners a disservice if he heard differences but suggested they were not significant. It’s better to let the listener decide if they are significant.