Some people don’t want some changes happening to the software in the first place, especially if they are contented with the current version and don’t want to relearn all the new features from scratch. Some updates end up eating significant bandwidth of data and keep the device battery running down a lot faster than usual. Some other users might know the issue and won’t upgrade to a later version, but it seems irritating when the OS update prompt pops up every time. Some iOS, Android, Windows Phone or PC, macOS, and Apple TV users might have issues with app compatibility when upgraded to a later version of their Operating Systems.