From my point of view, technically speaking, I share those who cite computer music; certainly assisted composition will have and is having a great deal of space.
As for Lachenmann's experiments regarding the defunctionalization of timbre, for me they are amply superseded by the sampling and synthesis possibilities inherent to electronic music, where sound is composed even in real-time, thus with the flair of performance. I will return to this point later.
And in reality, I notice that Lachenmann is known very much for this aspect, but he also writes other things and his music is effective regardless of the experiments he used to do, which show a different tendency.
Donatoni and his techniques are now well and truly historicized... even taught in some academies, and experience teaches that when something becomes catechized... it is already outdated. Enough with the 'Donatoninis'.
In effect, the Japanese and Americans are doing very interesting things and certainly the classic counterparts—avant-gardists/traditionalists—are rebalancing.
In the last 30 years, a lot of children of postmodernism were going around... bit by bit, once the gloss of experimentation had worn off, many die-hards are rediscovering a taste for modernity within tradition, and music for images helps with this. I read the word “post” too much in posts... not without reason, in my opinion.
If we really want to talk about trends, we can say that the world is now one; Westerners take from the East, Easterners take from the West. The economic world has a new equilibrium (compared to the 1980s) played out between American ingenuity and Chinese manufacturing.
As we know, means (including musical ones) go where the money is... and not by chance it was the phonology studios that allowed for the development of electroacoustic music.
If we add that in such a cohesive social context (which includes everyone and not just professionals) art music would be out of context... I leave due reflections also regarding the fact that for quite some time composers have depended on performers, and in ever-increasing numbers they prefer tradition. As always, the relationship between composer and performer is fundamental; see Paganini, Liszt, Berio with his wife, all those who relied on the Arditti, etc.
Cyclically, it happens that the virtuosity of the performer becomes a driver, but then there is always a settling phase.
We are in this phase, in my opinion... they don't commission avant-garde pieces to me, they ask for musical pieces that are interesting, enjoyable, and not extreme from an executive standpoint (in short, human). The classic phrase is: “Maestro, don't put 7 notes in my right hand, 5 in my left, a broom up my... and a dust cloth in my mouth.”
Turning back to Lachenmann—and I say this to myself first: there is no point beating around the bush, we make instruments do the worst things: there are those who break them, those who saw their strings, those who theatrically make them sound without strings leaving only the gestural aspect, and the list is infinite. But the new sound is the electronic one, so those interested in hearing/playing traditional instruments want to hear them for what they are and what they do best, and I dare say that besides being right, perhaps it is better not to limit oneself and to complete one's training by arriving at the field of computer music.
Example: if I want to hear a flute... a flute is enough, not a cello playing like a flute. Lachenmann's idea is interesting, just as happened with sound with Webern (... who cares about him today? Interesting, but it has become extinct in its aphoristic nature... one wants to "eat" the meat and not just the bones, the skeleton) or Cage conversely, silence interrupted by sound... today does music or philosophy count?
Anyway, all this doesn't prevent me from indulging my whims... precisely.
These are all things that can provoke reflection... free thoughts.