I used to care about owning my music, but over time the money just kept adding up and so did the inconveniences. Want this artist's albums on my phone? Dammit, gotta take time and copy all that over. New music? Welp, there goes my food for the month (I don't like pirating). I made a new playlist on my computer, and I want it on my phone? Dang it, it didn't find the tracks that I copied on there before and so it's useless.
Paying $10 a month for a streaming service (I use Google Music) made a lot more sense to me for than paying $30-$100 a month buying albums.