End of music came with MTV.
With the entrance of music video, it became an visual entertainment, instead of something you listen to.
Now we have auto-tune which allows any fucking dipshit to sound like he can sing worth half a swamp rats asshole, and as long as you have image, you get somewhere.
I'm not saying guys like Bachman Turner Overweight ("You Ain't Seen Nothing Yet" fame...aka BTO) should ever make it, but based on the image they had and the other acts of the time, they would never get a first glance much less a second glance in today's music world.