Apple's latest operating system, iOS 10, is seeing quicker adoption rates than iOS 9 saw during the same adoption period last year, according to data collected by Mixpanel. As of 10:00 a.m. Pacific Time, 24 hours after iOS 10 was released, the OS is installed on 14.45 percent of devices.
Comparatively, 24 hours after iOS 9 was released, it was installed on 12.60 percent of devices, also based on data gathered from Mixpanel. That's also similar to iOS 8 adoption rates in 2014, suggesting iOS 10 is slightly outpacing both updates, likely due to the wide range of new features introduced.
I hate the update but I have it. There are features that you simply cannot go without and still be accessible to other iPhones i.e. The changes to iMessage.