Back in October, iOS 11 overtook the older iOS 10 to become the most popular version on iPhones and iPads. That number has grown to 52% since then half of iGadgets run the latest major version.
Adoption has been slower than last year iOS 10 hit 60% before the end of October. Still, a major reason for numbers flowing from the old version to the new one is people buying a new iPhone and this year the hottest model the iPhone X launched later in the year.
Also a number of devices (iPhone 5 and 5c, iPad 4) were left behind on version 10 and will not be going up to 11. They are mission out on new emoji and Apple Pay Cash.