I am getting used to it as in I've learned now not to press my phone too hard anymore to accidentally trigger it. Most apps replace it by a long press leaving only the force press home screen menus as the thing you'll miss out on.

> how pervasive is 3d touch?

Not very. It's mostly a few shortcuts, the only genuine feature is that you can force-touch the keyboard to get a sort of trackpad surface (for more precise cursor movement in text)

I use it mostly to control the cursor when I'm writing text, and seldom to peek/pop emails.

But now when have to write text on a phone without it, I notice immediately, it's mildly frustrating.

I use it mostly for app switching (force-press on the left screen edge) and cursor movement (force-press on keyboards).