When athletic height jumping was considered done and perfected, there was the Fosbury flop which opened new possibilities. Do you think there was such a moment in the music history? When someone showed how things can be done and from there everyone is using his/her technique?
Not just one imho: if we go that back in time I’d start with electric instruments, more recently (~50 yrs ago) multitrack, then electronic music (whether you have it started with synth in the 80s or with music entirely made on a computer in the early 00s). All 3 changed the game and were adopted by everyone