Good to read that you reached sonic nirvana in this life-time: most people do not! Also, like another member wrote, you've realized that it's about the music & not about the electronics/equipment. Two important things to realize about this hobby & then one can make some very reasonable, good sounding purchases.
I believe that there has been plenty of progress since the 1970s but IMO it has been in the digital arena & in the materials area. Since the advent of CDs, people are steadily & gradually getting a better understanding of how to make better sounding CDs that have less digititis in them. Materials technology has also had a vast improvement whereby passive & active components are more reliable & more importantly more transparent. Older architectures of power amps, preamps (that are very solid sonically) sound way better if many/all of the components are replaced with today's better quality components. The architectures of yester years' electronics are solid & often carried on even today. No reason to change as humans still listen the way we used to in 1970.
Like George Bernard Shaw once wrote (I think it was him): too much of anything is bad!
Don't take your downward spiral to the limit - you'll crash..... There has to be a cut-off point beyond which you leave hi-fi & enter mass-fi.....
I believe that there has been plenty of progress since the 1970s but IMO it has been in the digital arena & in the materials area. Since the advent of CDs, people are steadily & gradually getting a better understanding of how to make better sounding CDs that have less digititis in them. Materials technology has also had a vast improvement whereby passive & active components are more reliable & more importantly more transparent. Older architectures of power amps, preamps (that are very solid sonically) sound way better if many/all of the components are replaced with today's better quality components. The architectures of yester years' electronics are solid & often carried on even today. No reason to change as humans still listen the way we used to in 1970.
Like George Bernard Shaw once wrote (I think it was him): too much of anything is bad!
Don't take your downward spiral to the limit - you'll crash..... There has to be a cut-off point beyond which you leave hi-fi & enter mass-fi.....