von Bulow said something along the lines of Bach being the old testament of piano music and Beethoven being the new testament. Bach for the first stage of deve

von Bulow said something along the lines of Bach being the old testament of piano music and Beethoven being the new testament. Bach for the first stage of development and Beethoven for the end of the development stage. Maybe an answer to OP could be Beethoven is a reaction to, or maybe, completion of, Bach's work. Or Beethoven is a bit more playful and experimental than Bach in general? Or TLDR is physical development of the instrument didn't end with Bach it ended with Beethoven. So its kinda hard to talk about one without talking about the other.