Thanks for the feedback, Tom.
What is my situation right now?
I will be again on the road more often in the near future for excursions and not at home at the computer. Indeed, "Neue Musik" is less about easy listening - you have to want that. Certainly not everyone's cup of tea. Maybe I'm a bit stubborn about that, not only about this topic. I'm probably just always eager to learn. Maybe it helps not to become prematurely stupid in old age.
At the moment I'm still studying the biography of Wolfgang Rihm, and there I find a lot that I know to some extent because I own some material already and was also a little involved in the cultural scene in Karlsruhe. But I'm also discovering many new insights. Wolfgang Rihm is incredibly productive as a composer and also extremely gifted in language when it comes to describing his work and the music as such in general. Of course, I don't like all of his pieces, maybe even rather little of it, I'm sometimes more excited by sequences being a collector of beautiful tones and sounds.
The other day I bought a CD, it's actually too much trouble for me now to rip it and to add it to my digital music library. But I can't find everything on the streaming providers. It's about Eugen Werner Velte, who was a teacher of Rihm, and about Veltes students. During my time in Karlsruhe, we attended many concerts in the Velte-Hall at Gottesaue Castle.
Funnily enough, it turned out that one of his pupils, Ursula Euteneuer-Rohrer on the CD, was a classmate of my wife's at the High-School. I had also met Ursula once and knew she was a composer, but I hadn't paid any attention to it. BTW: I don't really like anything on the whole CD. I could have saved myself to buy it.
So the biography is a very interesting book, which I could really recommend. But it is only available in German.