The beginning of the end was the death of Top 40 radio. These days, every station is specialized to one genre of music so no one is exposed to anything new. I listened to WLS and WCFL in Chicago (RIP) in the 60s and heard, and learned to appreciate, a little of everything.
The Decline of the Music Industry
Click bait for sure! Actually, this is Frank Zappa's opinion on why the industry declined, but if I would have put his name in the title, many would have skipped over it. I personally never connected with Zappa's music, but I do agree with what he has to say here.
https://www.youtube.com/watch?v=GowCEiZkU70
https://www.youtube.com/watch?v=GowCEiZkU70