This is great - it being a separate app solves some core problems!

It's a hard firewall between my "normal" music library and classical, which means risk free shuffle play. I never want Bach and Slayer in sequence.

They can optimize the UI, recommendations, etc. based on music that is all about reproduction, rather than being performed by the original artists.

Going against the grain and honing in on a total niche is so awesome and hopefully a sign of things to come.

I enjoy this split with movies too, the Criterion Apple TV app is such a nice break from the noisy HBO Max, etc. stuff.

And yes, I agree, Jazz would be an obvious next niche to target with a dedicated app!