I believe that in 1978, the year of Elvis Costello and the Cars, the Best New Artist was Taste of Honey (remember "Boogie Oogie Oogie"); the Clash and the Pistols weren't even nominated. Then there was the year the Best Rock and Roll recording was "The Alley Cat."
Folks, if you watch the Grammys for anything but gawking purposes (and the inadvertent good performance), you've probably missed the point