As I grew up, I kept actively listening to music, (both classica/baroque that my dad played on CDs or heavy metal music I loved). Same thing happened with TV/movies.
Nowadays, my wife loves to turn on the TV when we are eating just as "background noise" but darn I find it difficult to focus on eaeting/table-conversation vs whatever is in the TV. For me music and TV have always been mindful activities.
>It's actually kind of bizarre that such a rich artform is so often relegated to background accompaniment for some other task
This is so true, and also sad. I used to go to the Gewandhaus Leipzig in Germany to listen to live classical music concert. The appreciation of richness of a lot of music is being lost.
I'm mostly like you in that I prefer actively listening to things (especially when searching for new things). But revisiting known things without searching for more can also offer different feelings, like a sense of comfort or some mental priming for a mood while you're doing something else. It's two different ways to listen to music for two different kinds of experiences.