Example:
Apple held my iPad 2 hostage until I stopped using iOS 8. I forgot my unlock pin (because I lent my iPad to someone else) and there is no way to factory reset it without also updating the OS.
So now Flux no longer works, and there is no way to adjust the gamma on this device, which means I no longer like reading on it before bed. And there are plenty of other regressions in iOS 9 as well. And they forced me to update my desktop just to interact with it.
SO, Apple very much forced me to update, if I wanted to keep using my device. There is no reason that updating iOS should be required to factory reset it.
So now Flux no longer works, and there is no way to adjust the gamma on this device, which means I no longer like reading on it before bed. And there are plenty of other regressions in iOS 9 as well. And they forced me to update my desktop just to interact with it.
SO, Apple very much forced me to update, if I wanted to keep using my device. There is no reason that updating iOS should be required to factory reset it.