I bought my iPad Mini 2 Retina when it first came out which I think was 4 years ago. To this day it still works perfectly. I run my entire business off of it and it does everything I need it to do. Now I see an update for iOS and it says that it's the biggest release ever. I have always updated to the newest iOS in the past, but I don't want to press my luck with this. Should I stick with iOS 10 to avoid the newer OS slowing it down! Or should I upgrade to iOS 11?