While not everyone (even of the same side of the "generation gap") liked the same artists, there USED to be stations that played ALL of the contemporary hits of the day (and programs like Ed Sullivan's that booked the contemporary hit artists of the day, regardless of Ed's support for their music).
There is no more "something for everyone".
But radio already started to fragment sharply at the introduction of rock and roll into the music charts. There is the famous clip of the DJ smashing a stack of 78s making a pledge to never again play rock music on his station. He claims in the clip that the top charts used to be a good indicator of music but "no more". There have been several such schisms.
Even "classic rock" (the album oriented rock AOR format) stations of old "broke" with adding any more artists (and eventually even adding new recordings by the canon artists) when MTV ushered in a lot of new wave, new romantic, etc. bands into the charts. I recall one such station playing the Go Go's on their station (Our Lipped Are Sealed?) on a smash or trash segment and asking if listeners thought they wanted things like this added to the rotation.
bump