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Apple continues to not give any care whatsoever to anything outside their walled garden. For the longest time you couldn't even preview songs on iTunes store without having iTunes. Want to watch their biggest WWDC live? Had to use Safari until last year. Obviously iMessage and FaceTime are complete no-gos outside their walled garden too. This is how they keep people in. They have to close down their walls as tightly…
I would rather have a delightful user experience than multi platform support. Worst service to ever come out of Apple is Apple Music because it is multi platform. Their desktop app is just a shell around their BETA web version. Sluggish UI, memory usage goes up to 4GB easily...They didn't even try...all in the name of making it easier to support multiple platforms.
iTunes was multiplatform (Windows & OS X), if Apple wanted they could invest the resources to do so for Apple Music. Apparently it is not a priority tho