Apple is already 'working' to bring back an important feature it only just killed off
It's a way to share your library around your WiFi network: You could play your MacBook's music from your iPad, your iPhone's from your Mac Pro, and so on. But with iOS 8.4, the feature was stripped out of iPhones and iPads without warning.
We still don't know for sure why this happened - we've reached out to Apple and will update when it responds - but there has been speculation it is to do with rights issues surrounding Apple Music. The update also included the first version of Apple's new music streaming service, so it's possible that the Cupertino company was unable to secure the necessary rights from the labels to offer streaming across multiple devices.
A fix may be imminent, however. Eddy Cue, Apple's senior vice president of internet software and services, tweeted last night that the company is "working to have Home Sharing in iOS 9." We first saw the tweet over on 9to5Mac.