This is debatable to say the least. Lovers of the avant-garde commonly trot out the argument that there's just no room for genuine, transformative innovation within the mainstream that can be grokked by average folk, that it is played out in some sense. And lovers of mainstream music (and arguably mainstream culture more generally) routinely prove them wrong, by managing to innovate within those boundaries in a way that's genuinely compelling to many. It happens again and again.
avant-garde composers were playing with recording and editing techniques for a long time before the beatles came and used those ideas in a more catchy way, with a hairstyle to boot. The innovation is closer to the business side than to the music itself.
Oh, I must have gotten lost. I thought I was in a forum dedicated to hacking where a post had been submitted to justify the importance of a composer almost universally found difficult to listen to to a mainstream audience. Probably took a wrong turn somewhere.
> Who cares?
Whoever posted the story here clearly did one way or another. Everyone who commented, both of us included, as well. Affecting detachment while taking the time to clearly post how detached one is is not very convincing.
I care about the music, people should be more open to hearing challenging music. That doesn't necessarily mean "the mainstream", that entails a whole cabal of mechanisms at play that go beyond what an individual chooses to listen and how.
Also many now revered composers were shunned by audiences of their time, such as Mahler.
Bach is now regarded as the greatest composer but he wasn't exactly popular during his life outside select circles.
Not to mention Bach had to regain popularity through Mendelsshon.