[kaba0]

I believe it was removed in big part due to being a relatively big energy drain. With that in mind, I don’t believe it was a bad decision, even though I liked the feature as well. (Though probably with additional R&D on the topic, it could have been improved)

[duskwuff]

And, IIRC, 3D Touch was also technologically infeasible to implement on iPad. That sharply limited what they could do with it, since it would never be available on all iOS devices.