Herbert Von Karajan... was very involved with the recording process as well as conducting his performances -Yeah, so was Leonard Bernstein. That certainly gave us some sonic gems!
If HvK used the sonics of his own DGG vinyl releases as a benchmark, it's no wonder he fell in love with digital. What a pity his magnificent Beethoven performances were all released on second rate Dodgy Grungaphone vinyl.
I love HvK's performances, but his "insights" into the quality of different recording/playback media must be counted as worthless. His own records were unfailingly mediocre.