Yeah, I suspected that you meant to say "will not vanish". And I agree, I don't think it will ever really vanish. There is still no more effective a way of communicating instructions to performers whom you are entrusting to execute your music.
And it's true that traditional notation doesn't cover modern scenarios like trigger generated notes. But OTOH, how often is it important to have to communicate that type of info to a performer in the execution of a musical score for a film? That kind of thing is programmed by the composer. Still though, I see your point. If you did want to have elements like that as part of a performance, how do you notate it for the performer?
As technology changes I guess many people feel that trained composers and traditional methods of making and learning music is dying out. As that may be true imagined what new levels of making music we can achieve with the upcoming technology that we have