I'm wondering if it's finally safe to update. My wife's and my iPads (2017 9.7") and iPhones (6S) are still on 10.3. We'll be going on a trip, soon, so I'd like to know if it's safe to update or is 11.x still problematical? Note: We don't have iTunes, nor would it be practical to attempt to install it. MS-Windows is a rarely-used "secondary" OS for us, and we have no Macs. So backing up to iTunes is a non-starter. If iOS 11.x is likely to trash our devices, we'll just stick with 10.3. In that case: Is there any way to stop the repetitive iOS 11 downloads and notifications? Thanks!