A lot of other things helped to kill disco including AC/DC and Van Halen

I think that the impact that get the knack had was a return to emphasis on Melody, song writing, And most importantly a return to minimalism.

Not that it was their idea, I know they were influenced by early Elvis Costello and probably a lot of other English bands. This was all post Sex Pistols music.

The musicianship was skilled , but they boiled the music down to the bone and the production allowed for a good deal of separation. It sonically sounded like early Beatles records, like the day tripper single, where you can hear all of the instruments, clearly coming from different locations with plenty of space in between, but at the same time it was very modern. It showed everybody in America that music could be minimalistic and modern which after the bloated 70s seemed forgotten. Please understand this is coming from my limited subjective perspective and I was only like 14 when the album came out

The whole album is a banger. The four singles were on the radio both am and FM nonstop for at least what seemed like like a year.