2015 has seen Apple release some of its buggiest updates to date. iOS 9 took devices that had previously "just worked" and made them hair-tearingly frustrating to use (iOS 9.1 did improve things dramatically), while OS X 10.11 El Capitan has been plagued by so many show-stopping bugs that I'm waiting until the 10.11.2 release before rolling it out onto my workhorse devices.