If it was designed well to begin with (as my HK 730 was), upgrading the caps, transistors and wiring with high quality parts is something many reputable techs do. An LP12 feeds the Hk. There's nothing I've heard recently (that didn't cost a bazillion dollars) I'd trade it for. So much of the "accurate" sound is also dry, analytical and unmusical. Color me vintage.
Can a vintage piece over 40 years old be Highend
I have a passion for listening to modern sound reproduction both tube and SS with matching gear, but also sentmental vintage equipment. I have speakers that were considered very much Hi-Fi in there day and an old working amp to go with it which was also Hi-Fi can they be called High-End?? The yougest of these is about 42 years old the oldest 46. ( I am discounting altogether the pieces from the 70s which I own and listen to from time to time also)