I’ve been thinking about this recently. The music of the 1960s and 1970s has a much higher profile today than the music of the 1910s and 1920s did fifty years ago.
But, music of the 40s and 50s did have a long run on the radio back then. Because radio homogenized, Boomer music persisted. And then we went digital/streaming.
About the 1920s, people did collect and deeply dove into those acetates. It provided a critical spark for an explosion of folk and blues in the 50s and 60s.