Interesting usecase. I probably like listening to about 10-20% music a day that I have never heard before. Every 2-3 years, I am basically still only listening to 5% of the music I did like in that time period. So the musical "churn" for me is high where ownership is essentially meaningless. But I can see how someone with a different set discovery needs/wants would have a very different sense for the product.
That's exactly how I listen to music too.
I've got a very small selection of albums I've listened to throughout my life and other than them my music churn has always been as high as possible, though typically a great album lasts a month or 2.