“Hard Habit to Break,” a 1984 power ballad, was one of Chicago’s biggest hits and part of the band’s era of increasingly pop-friendly tunes. David Foster, well-known for producing lush songwriting, was one of the song’s co-writers and arrangers at this time, layering the band’s trademark horns with towering strings and synth saturation like there was no tomorrow.
The modulations are everywhere: 0:35, 1:00, 1:32, 1:56, 2:19, several quick pivots during the bridge around 3:12, and 3:18.