Reminded me about "How Computers Ruined Rock Music": https://www.youtube.com/watch?v=AFaRIW-wZlw
[0] Seriously, there's a bunch of great music from the 60s - and that's what everybody remembers - but there's also a ton of absolute pap from that same decade. You just don't hear it too often any more (thankfully!).
While this is no doubt true, the rate has plummeted from (say) 15% greatness to 0% greatness among commercial music. The business model has changed, with 360 contracts and producer-centric, sales-hyper-focused development. There's great music out there, but it's not being produced by the big labels any more, and that's something truly, and unfortunately, new.