Today Apple released OS updates for all of their platforms, though it is all minor updates it is always a good idea to stay up to date. Released today was OS X 10.11.5, iOS 9.3.2, watchOS 2.2.1, and Apple TV. The one notable change is now night shift works while in low power mode. Other then that there is nothing crazy in these updates mostly security updates and bug fixes. With new major OS release on the horizon there is nothing shocking in this.
Also Apple released a new version of iTunes that is suppose to help with the non reproducible iTunes bug that deletes users music. I still think this is user error and not an iTunes bug though.