I'm genuinely wondering why the NU was added in first place, I can't think of any app that made egregious use of that outside of the Gallery and Photo App. They didn't even allow any access from third parties in a few initial iterations.
On-device voice to text for Siri. Facial recognition in the photos app. Text recognition in photos. Scene recognition and adaptation in the camera app. And FaceID.
Not all those were available from day, except FaceID.
