I have the premium headphones and DACs that would make Amazon Music HD, it’s new hidef tier, worthwhile for me. But…I really don’t want to subscribe to anything other than Apple Music, due in large part to Apple Music’s integration with all my Apple hardware, which makes life easier for me and every member of my family. Also, I do not like how Amazon’s Prime Video app looks or works so much, and don’t want to invite that kind of friction in my music listening experience. I do applaud their direction into higher quality streaming, though.