How often radically new musical ideas become common practice? New in a sense where composer/performer is unquestionably first to abruptly depart with musical tradition with no similar precedent, even at small scale.
Also, let's focus only at a very small musical ideas, couple of measures at most, where you could show it and say, no one has ever done that before.
Has it ever been the case before modern music (e.g. atonal music) and music evolves with audience rather then winning everyone over?