With iOS 16, Apple introduced a new Rapid Security Response feature that is designed to allow the company to deliver security improvements to iPhone users more quickly and easily without performing a full iOS update.
By default, Rapid Security Responses (security measures and system files) are installed automatically. However, Apple has introduced a way to remove them. In an updated support document published recently, explained Apple says you can remove a Rapid Security Response from your device by going to Settings -> General -> About, tapping the iOS version, then tapping Remove Security Update.

iOS 16 makes security updates easier
According to Apple, you can reinstall Rapid Security Response at a later date or wait for it to be permanently installed as part of a standard software update. It's not clear why Rapid Security Response needs to be removed, but it's good that users have this option. There's also a switch that can be used to turn off the automatic installation of security measures and system files so that they can be downloaded manually. (Image: Apfelpatient)