Prior to about 2004 more music was very much controlled by the majors and media. It’s that whole thing about how festivals like Reading tend to have lots of headliners that made it big 20 years ago.
In the 90s we all pretty much had copies of the same narrow albums but these days there’s do much more available to listen to and pick up.
This it’s maybe not surprising a list based on averages would show up an old classic like that which everyone heard as a big hitter