I agree discovery of 3D interactions is terrible -- essentially nonexistent -- which does justify the epithet "useless" to some degree.
Good luck.
Personally, pushing on the flashlight or camera buttons with 3D touch actually feels really satisfying, because it really does feel like I'm clicking a button even though I'm just pushing on my screen.
I've had iPhones for work for years and I'm just learning about this functionality today from reading this thread.
Asia wishes to disagree with you.
There are literally millions of people here who turn on AssistiveTouch on a brand new phone for no other reason than to not use the physical home button because they believe it will wear out/break.
But does it actually? Because if it's just a belief, nothing prevents the same belief from occurring with the 3D Touch home button. I guess it's going to be a feedback loop because obviously there wouldn't be reports of failures if nobody uses the physical button, but assuming normal usage, does the button fail frequently enough to be a concern? I think the west is a clear proof that this is not the case (unless something in Asia is breaking the buttons - climate maybe?).
Also I'm sure those people wouldn't actually use the phone at all if they had an equivalent way to achieve the same tasks that doesn't involve risking breaking a phone.
Finally let's put it that way - if you use AssistiveTouch right away you lose the home button. If it breaks after X months/years of use you also lose the home button. Wouldn't it still be better to get value out of the button while it's still working rather than falling back to AT right away?
It may be a cost/value issue. Better to protect a perceived fragile part so it’s not damaged when they want to sell it for a newer model.
Yes, that was parent's "some may argue..." part. That doesn't mean Asia are right. Some in that same part of the world would argue that running a fan can kill me, so something something urban legends.