Amp improvement since 1994?

-
Plenty of improvements
Take Pass Labs for example. The new supersymmetry is amazing!
Real designers are constantly pushing the edge of what is possible.
-

-
Sorry to disagree with George, but there are new topologies.
The devil is always in the details.
I tricked out a pair of Dynaco MK 3s with the best parts, silver point to point wiring, big capacitance in the power supply,… It sounded good, but still dated.
Today we are spoiled with this high end gear. It has less distortion of all types.
I am not saying that older gear sounds bad but design goals have changed over the years.
As for vinyl vs. digital, that is a different argument altogether.
-