Amp improvement since 1994?

I would say...accessablity to quality tube amps (rogue for example) . Hybrid tube and SS. and alos refinement and acessablity of quality SS as well.

The better amps of today are better, but, much more expensive than 20 years ago.

The average amps of today are as good, as the above average amps of 20 years ago and still in reach of the average audiophile today, but twice as expensive.

Inflation in the price of all amps, because most all mass produced, foreign made, amps are gone! Small companies can only make money selling a few expensive high profit margin amps.

The audiophile market has gone to the rich, and shrunk for the average audiophile who mostly buys used!

Csontos,

Of course,there is no exact answer. But there are many very high quality amps out there from many reputable companies that leverage various technical advances available these days not available 20 years ago. The best general example of progress in amp technology in ercent years is Class D amps that are up to the task of truly bringing out the best in smaller full range less efficient speakers, that years ago required large heavy monster amps that most would not have wanted to deal with, even if they could afford them. Nowadays, there is no reason one cannot find an amp capable of driving most any speaker to their maximum potential with just a modest investment. 250w/ch to 8 ohms or more is often NOT overkill for best results.

You can finds amps today that are much better than amps 20 plus years old. SS amps today have far less grain and can sound every bit as good as a great modern tube amp. Parts quality has greatly improved, so if an amp is built with these SOTA parts, it will indeed sound much better.

We have learned and applied a great deal with damping and shielding inside an amp. Power supplies are better and on and on.

Just takes some effort to find one that meets your sonic preferences.