Of course. Fun fact, the father of Galileo Galilei, Vincenzo Galilei was a musical theorist who, long before Bach, established the idea of equal temperament.

I myself don't believe in before/after thing. It's not that one day all the composers in the world agreed to write music by the book. I think things shifted slowly but steadily along with the technological progress. Compared to Galilei's time, in Bach's era there were more books to learn from, more and better developed instruments, and with the rise of bourgeoisie, more listeners (and musicians).

Bach is just a convenient milestone.