iOS 10 adoption rate nears 80%


MacRumors:

Just over five months after iOS 10 was released to the public, the operating system is now installed on 79% of active iOS devices, according to the latest adoption data shared by Apple.

I think a driving force with adoption rates is Apple frequently nags you to upgrade and there's generally little reason not to do it other than the inconvenience. Apple has recently address that too recently, however, with the ability to postpone updates overnight.