I read that. Depends on what music. The complexity in the music is a complex thing :). In terms of the melodies, harmonies and how they evolve, a lot of the pop got super lobotomized as the laptops became the main instruments. But at the same time, a lot of it is heavy on sound design and creating a "vibe".
Also complexity doesn't equal good music. A lot of great music is (deceptivly) simple.
https://www.youtube.com/watch?v=TzIZPZN5K60
Yes, one can argue this Arvo Part piece is not exactly information-poor, but in music, simple is often a good thing that a few can pull off well.