I'd wager it just about maxed out their silicon, because it's taken two years of software optimization to speed up FaceID on the iPhone X. It was a little bit s

I'd wager it just about maxed out their silicon, because it's taken two years of software optimization to speed up FaceID on the iPhone X. It was a little bit sluggish until iOS 13, which to me indicates some clever software trick was able to squeeze out a little more performance from already hardworking chips.