Not even sure it's decline so much as cultural fragmentation. The head pop culture creations (hollywood movies and the top streaming songs) are things with uni

Not even sure it's decline so much as cultural fragmentation. The head pop culture creations (hollywood movies and the top streaming songs) are things with universal awareness (so things that came of age before the internet and mass media was created by a few brokers). The tail has been growing absurdly. Go ask a teenager what they like to watch or listen to, they'll probably mention some youtube/tiktok streamers you've never heard of, and have a tiny cultural footprint.