I think we have. It seems like the most we can do now is remix, refurbish, and reinterpret what has come before us. Michael Stevens, the creator of the You Tube channel Vsauce, has some interesting facts about the limited nature of music. It seems paradoxical that something that has the potential to create more 5 minute songs than there are atoms in the cosmos, gives us so many songs that sound alike.
Michael makes the point that our human brains are wire to like a small subset of possible harmonic variations. He does not go into why we like only a small subset but it is my belief that is why music can be challenging learn. When we learn music, we have to learn to avoid the billion quintillion possible harmonic arrangements that don’t sound so good. That’s what music theory is for. It provides a guide to the harmonies we, as humans living in this part of the Milky Way, like most.
Enjoy the video!