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The screen was actually presssure sensitive with a fair amount of precision. https://en.m.wikipedia.org/wiki/Force_Touch

Interesting, so there was a patent claim settled at the start of 2018 over this, and the iPhones released at the end of 2018 had the feature removed. I wonder how much of an impact that had, versus usability / weight / cost considerations.

IIRC:

Force Touch is something supported by 2015+ MacBook trackpads (you can push harder to effectively middle-click something) and 3D Touch was the iPhone screen tech that did the same thing, which has been replaced with Haptic Touch (equivalent to Android's "long press").

Yes, they meant to say Haptic Touch.