Oscar Raymundo for Macworld:
Apple Music scores with Taylor Swift and Thom Yorke, but holdouts include The Beatles, Prince, and The Black Keys.
This is kind of why I use music streaming for discovery but not for general listening.
(An earlier version of this post said Led Zeppelin was not included. That was incorrect. Also, the Macworld piece has since been updated. The Black Keys do show up but apparently not all their tracks actually play.)