In welcome news, Apple is going to start including its iTunes Match service as part of Apple Music:
If you are a current iTunes Match subscriber and subscribe to Apple Music, you can let your Match subscription lapse when it comes up for renewal and still receive the same benefits. If you don’t subscribe to Apple Music and still want the benefits of iTunes Match, hold on to your subscription.
And just as welcome, Apple is moving from matching songs using metadata to using audio fingerprints:
Apple has been quietly rolling out iTunes Match audio fingerprint to all Apple Music subscribers. Previously Apple was using a less accurate metadata version of iTunes Match on Apple Music, which wouldn’t always match the correct version of a particular song.
Somewhat Related: See how to use iTunes Match to upgrade song audio quality in my post, Before Canceling iTunes Match