Amps have come a long way since 1976 and one would expect that.
Just like mine, whether or not your statement is true is a matter of opinion. If you feel that a fancy biasing schemes or a sound shaping DSP is improvement, then I guess you're right by your standards. I won't deny that the A-S3000 looks beautiful on the outside and that copper shielding frame inside looks nice too but beyond that I'm thinking that most of what Yamaha has learned since the 70's is perhaps better marketeering; interestingly enough their new amps look like their early models both inside and out.
Also, what kind of warranty do you get these days. Lets wait 35 years and see how many of these are still working ..


Still no word on price. :sigh: