Well I'm in my 50s, and I mostly stopped finding new music when record labels, streaming, and social media destroyed the prospects for people who would otherwise make that new music for me to find.

New stuff still arrives (you're not going to predict that me-at-15-loving-Megadeth will much later also love Billie Eilish or Gin Wigmore or Mirel Wagner or ...) but most "new music" is garbage by the standards set by about 50 years of music (much of that before I was alive and thus well before my "peak influence").

I suspect the "findings" of the article suffer from environmental effects that weren't considered/controlled.