Comment by digiown
3 hours ago
Standard?? The standard is for the upgrade to be refused or not boot until you flash a newer one, not to brick the phone permanently. It's not an "ideally" thing for the manufacturer to not intentionally brick your device you bought and paid for.
>and you may damage your device permanently
https://service.oneplus.com/us/search/search-detail?id=op588
They make it clear that this feature is unsupported and it's possible to mess things up. The reason why it's an ideal and not an expectation is that flashing alternate operating systems is done at one's own risk and is unsupported. They have already told the users that they bear no responsibility for what may go wrong if they flash the wrong thing on that device. Flashing incompatible operating systems to the device requires people to be careful and proper care to ensure compatibility before going through with flashing was not done.