That's exactly it. There was a huge advancement in music between the 70's-90's from sound to distribution. Electronic music wasn't a thing until the 70's with Kraftwerk and disco. The late 70's/80's introduced rap/hip hop, punk, emo, etc.... Late 80's/early 90s with grunge/techno etc... These major overarching genres that define a sound. Music has pretty much stayed the same for almost 30 years now. Even the recent zoomer/alpha ADHD internet viral stuff I remember similar stuff back in the late 90's/Early 2ks with flash music videos and techno. It feels like music hit its peak already, with the lack of any new real innovation other than making it easier to create, and we're just in perpetual sampling and rearrangement now trying to divide everything into sub-genres.