Every device that does this can only reach lower levels of volume than most of the ones that don’t (PCs, Walkmans…)

It’s like that “save electricity, unplug charger” popup that I only ever saw on phones with switching power supplies, whose zero-load power is several orders of magnitude less than the heavy transformer ones. Or the constantly-moving 🔇 icon on LCD TVs, although it takes many days of a static picture to burn them in as opposed to CRTs and OLED ones.