The untimely deaths of Buddy Holly, Ritchie Valens and J. P. "Big Bopper" Richardson resulted in a massive "creative hole" in popular music, especially with rock n' roll. That very change made it possible for the rise of the black-oriented Motown style of popular music from 1960 on and eventually the British Invasion that started in the fall of 1963 with the rise of the Beatles.
Are you kidding or is this just a guess 'cause you like that one fateful song? Ever heard of Elvis Presley, Dion, Frankie Avalon, Bobby Darin, The Platters, Jerry Lee Lewis, The Drifters, The Chantels, Chuck Berry, The Diamonds, Roy Orbison, Johnny Cash etc., etc. They were all on the charts in 1959 when the plane crashed. Elvis was the top of the charts. In fact, he was even on a tour with Valens.
The music didn't die that day, but a couple of promising musicians did. The Big Bopper was not one of them with his one novelty hit. Valens and Holly had potential, especially Holly. Plus you're wrong about Motown coming just after. The early 60's girl groups on different labels like The Crystals, The Shirelles, The Ronettes, The Ciffons, appeared on the scene before Berry Gordy discovered Smokey or Diana Ross and way before the Beatles hit the American music scene.
I didn't have to Google any of the above. I lived it from listening to Elvis Presley at the age of 5 and followed music all the way up to these boring pop times. Sorry dude, the music didn't die, it progressed past those two artists. However, it would have been interesting to see what Valens and Holly could have done.