Latest reports are indicating that Apple may not continue to utilise 3D Touch after this year. I have to say I’ve never used it much personally, although I do like using it to drag the cursor on text input.
I use it for most of my apps. Evernote I can start a new note, Outlook I can open a new email, iMessage I can start a new message to my most regularly messaged contacts, Overcast I can jump to the latest podcast episodes, Facebook I can upload images or videos. I think the one app I use regularly that doesn’t have any 3D Touch functionality is Monzo
The rumours it would be replaced don’t seem very well founded, the only reason that would make sense is if they are going to embed a camera or finger print scanner actually in the screen but
I used to end up with my icons jiggling most of the time doing long presses. Deep presses feel good. And popping open email threads or web links or chat threads to see what’s in. It’s a great way to see what’s in a WhatsApp group without it marking it as read properly (even if you set your WhatsApp privacy settings to not share your read status, it remains on for groups). Its’ just a handy feature that I appreciate!
I’d miss it too. I use it daily on the keyboard to move the cursor and I often 3D Touch links to preview/view the memes without opening safari/taking focus away from the app.