During a recent visit at my local dealer, I inquired as to why the new amplifier we were listening to was so expensive?An Onkyo Grand Integra M-510 (1984-1992) will cost about $13k today’s dollars.
https://audio-database.com/ONKYO/amp/m-510-e.html
Compare within the same brand/line, YES!
Is it true that the best newer amps always sound better than the best older units?
For example:
Pass Labs XA100 > XA100.5 > XA 100.8
Accuphase E-530 > E-560 > E-600 > E-650
"always" I can’t say...