Hindsight is a generous and thoroughly unreliable editor. It softens the fights, brightens the good afternoons, and supplies an endless run of what-ifs that arrive uninvited at 2am. Even the wreckage, given enough distance, starts to look like a story you might choose again.
The danger of regret is how flattering it is. It lets you believe the fault was fixable and the ending avoidable, and that comforting story can keep you circling a door that closed for perfectly good reasons.
The music lingers and looks back, gilded and faintly sorry. Warm, nostalgic chords, a wistful lag in the rhythm, a groove that keeps glancing over its shoulder at something already gone.
The arc softens into rue and second-guessing here. Play it in the small hours, when the what-ifs come and you half want their company.