If you want your music to survive in the future, one must ask how the piece lives.
Musicians have to know it, like it and play it well and often.
Some old debates among composers have recently resurfaced, especially academic versus non-academic composers and tonal music versus atonal music. Such debates are not only futile, but also destructive in the overall struggle for acceptance and growth of contemporary classical music. Their students and colleagues ignore them, and the outside world knows nothing about them. This should be a major concern to us all and trying to put the blame on those within academia or atonal music misses the entire point. I have taken some clarinet lessons and can produce some sounds, but I do not claim I am a clarinetist.