After so many years, Benny Andersson walked into Agnetha Fältskog’s home, and the air seemed to hum with old memories. They shared quiet words, gentle laughter, and then Benny found his way to the piano. When Agnetha’s voice rose to meet the melody, the room transformed — as if the past had quietly returned to life.
When the first notes of “Don’t Shut Me Down” echoed across the world in 2021,...