> I suspect that purchasing music files to own will seem increasingly strange and inconvenient to younger people, though.

It'll be interesting to see what happens.

As a fan of blues, I've noticed that there are a lot of grey songs in my Spotify playlists. There's just no practical way to be able to listen to the music I want to hear besides owning it (Youtube is hit-or-miss as well).

For people who want to listen to pop, they're probably fine. But anything that's even a little niche is trouble. Or that's my experience, anyhow.