I've kept my 9.7 iPad Pro on iOS 9 for stability and performance purposes. There has been a lot of discussion on this approach, but every thread I've seen focuses on iOS 10. And every post I've read is about people keeping their Pros on iOS 10. Just wanted to know if somebody - like me - keeps their iPad Pro on iOS 9 - which is its initial version. I have it on 9.3.4, which is the version it shipped with on September 2016.