Maybe we'll finally get a music app where classical music isn't categorized by Album/Artist :) Classical doesn't really fit that well into a schema, since you have composers, performers, and then under performers there's soloist, or multiple soloists, which orchestra, which conductor, and so on. And it would also be nice to have things like "show most popular recordings of Beethoven's 5th".
That sounds like a schema to me. Hell, even popular music can have such complexities, it’s just that they’re usually ignored e.g. if you want to correctly tag a cover featuring a rapper, that’s basically a performer (cover band), composer (the original band, or the actual composer as that’s often not the band), the soloist (the guest), there’s also the backing band and vocals which may have their own identity, and the venue may or may need a mention (e.g. a tiny desk live usually has a different feel than a concert live).
Obviously it’s not quite as bad as classical where as you mentioned there are eve more roles plus you might have hundreds or even thousands of interpretations of the same piece versus a handful.