To me, Vintage gear means the late fifties and sixties, so the age of Stereo and Tubes. The Seventies saw the decline of tube for solid state, that went hand-in-hand with the explosion of the music scene and mass production. This mass production really hurt the industry, but at the same time it created many music lovers.
There may have been exceptions...Remember, GAS (Great American Sound)?...Ampzilla and the Son of Ampzilla, etc.!!!
I personally owned some mid-fi Sansui 717 series equipment, and still have my TU-717 Tuner. I recently inserted this tuner into my system, and it really sounds mid-fi, so completely non-involving, fat, and low-res. On the other hand, my 1964 McIntosh MR71 Tuner sounds wonderful.
I agree with Onemalt that the Eighties did make BPC, but this was already starting in the Seventies with BMC.
Going back to the Sixties and the Scott Sound question originally posted, I feel this equipment possessed the finest tone of any period which we still seek out today.