It’s bugfixes all around. Fingers crossed it really does bring an end to my HomePods forgetting to wake up when someone says “Hey, Siri.”
Mojave 10.14.3 is up too, now:
This update improves the security, stability, and compatibility of your Mac and includes the following enterprise content: When making a file-sharing connection that uses a valid Kerberos TGT to authenticate, users are no longer prompted to enter credentials.