Since I "upgraded" to iOS 10 about 4 months ago, I have needed to press the URL bar much longer and harder to get urls to highlight and then I have had to press the backspace key much harder to get stuff to delete. This is not only a great annoyance that slows my workflow down. After 4 months of pounding on the screen in this way the keypad has broken - its no longer reliably responsive. So my 17 month old iPhone 6S Plus is now unusable and worthless. I also have an iPad Pro 12" with iOS 9.2.1 and you can be sure I am NOT going to ruin it by "upgrading" to iOS 10.x.