Pop= techno background (techno repeats itself with tons of instruments which requires work to be put into it), lyrics, cool bridge, done

Old pop= funk, lyrics, cool bridge, done

Rock= well connected mash of instruments (i.e. techno background(funk) cept without synths), lyrics, cool bridge, done

Old rock= well connected mash of instruments, lyrics, cool bridge, done

Pop evolved
Rock didn't
o;