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?
There have been lots of technological advancements which led to revolutions in music. The electric guitar, multi-track mixing, synthesizers, etc.
Each of them brought with them while new genres of music.
You didn’t even mention the biggest technological leap; recording. Being able to capture music and play it at one’s will fundamentally changed virtually everything about music.
Yup. Radio did as well
Another thing is cheap, good-sounding speakers and headphones
Can you imagine Billie Eilish releasing Bad Guy in the 80s? 90% of the country wouldn’t hear a thing