That is the main and unfortunate reason why classical music is fading - classical compositions worth listening to are museum pieces from centuries past. Most contemporary "classical" music is the sound equivalent of abstract expressionist art: a collection of gimmicks like rolling dice to pick notes or playing the same note or chord over and over again for hundreds of measures.
So true. I have heard some that sounded like an orchestra tuning up with a lot of intentional dissonance and then somebody played the sound of a trash can full of glass and silverware tumbling down a staircase. Music deconstructed and destroyed. What's even worse, somebody convinced an orchestra to "play" it.