And although 3D Touch is almost entirely unused by almost everybody as far as I can tell, the actual physical implementation of it is brilliant. I wrote this: https://itunes.apple.com/us/app/3d-touch-explorer/id10603467... to demonstrate it (source code here: https://github.com/benslaney/3D-Touch-Explorer). The amount of granularity and the sensitivity of it - equal all over the screen - is crazy.