Apple Intelligence, previously opt-in by default, enabled automatically in iOS 18.3
Briefly

Apple has released candidate builds for iOS 18.3, iPadOS 18.3, and macOS 15.3 to developers, now enabling Apple Intelligence features by default during the setup. Previously, these features were off by default, requiring users to opt in. Users wishing to opt out must do so after setup via the Apple Intelligence & Siri section in Settings. This change applies only to devices that support these features, which includes certain recent models of iPhone, iPad, and Mac. This move follows trends seen with tech giants like Microsoft and Google.
Apple is enabling its AI features by default in the upcoming iOS, iPadOS, and macOS updates, shifting from an opt-in to an opt-out model.
Read at Ars Technica
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