As counterpoint, I used my first generation iPad until I broke the screen last year. (It withstood more than a few drops as the corners attested before finally succumbing.) Granted, my use case wasn't overly intensive: mostly just web browsing and video viewing (Netflix, HBO Now, iTunes). My primary gripes are with iTunes and video storage management, and while that was more acute with the limited storage of the first generation iPad, it hasn't changed with its 9.7" iPad Pro replacement. But that first generation iPad worked well for me, even with iOS 9.