When Apple released iOS 9.3.1, it removed the ability to keep Night Shift and Low Power Mode enabled simultaneously. The ability to turn on both features was already hidden and only possible by using Siri, but the iOS 9.3.1 update made it so that Siri would disable one of them before enabling another.
And, for once, some of what it can do looks genuinely useful.
Google Reportedly Set to Launch Tool Revealing Battery Degradation Over Time for Phones and Tablets, Says Android Authority.
Introduced in iOS 17.1 and watchOS 10.1, NameDrop is a novel feature that facilitates the sharing of contact information between nearby iPhones and Apple Watches by holding them together.
Sneaky! Though why on earth would Apple remove that option?