Earlier today, Apple released a number of maintenance and security updates for all of their OS platforms. At 1:00pm Easter time today, Apple pushed out iOS 12.4, watchOS 5.3, and Mac OS Mojave 10.14.6. Also getting updates today were current editions of Apple TV and the HomePod.
Just in time for the arrival of iOS 13 and new iPhones, Apple added a new feature that allows users to directly migrate data between old and new iPhones. That seems like a neat party trick, but not entirely unexpected give Apple's work to refine the process of sharing information between iOS devices, iOS to Mac OS devices, and iOS to watchOS.
On watchOS, a patch has been added that corrects an issue with the Walkie-Talkie app. Once the update has been installed, the feature will be available again.
iOS 12.4 update details
watchOS 5.3 update details
Mac OS Mojave update details