I have updated to iOS 10, and so far, I'm really not impressed, since it brings so few features that I care about that work on my iPhone 6 and in my region.
About a month ago, I discovered Apple had imposed new limitations on the free Apple Developer account. This limits the period that an app can run on your phone to 7 days (due to Provisioning Profiles) and the number of changes you can make to the project (not the source code, but Capabilities like App Groups).
I, like many other iPhone users, turn on AssistiveTouch so that I don't have to press the Home button. Historically, this button has been quick to fail, so using the on-screen icon will save some wear-and-tear. And with iOS 9, AssitiveTouch has become customizable! Shocking (for Apple, not much is customizable)!