Every smartphone is prone to problems and Apple isn't immune to this issue. You probably remember bendgate and the latest defect — the iPhone 6 and 6 Plus touch disease. Well, unlike those two issues, Apple already has a short term fix in place, just in case your home button breaks on the new iPhone's.
The iPhone 7 and 7 Plus have plenty of new features, include a new home button that uses a taptic engine. Instead of hard clicking on the home button, just tap slightly harder on the home button, and the tap functions like a click. Like any piece of hardware, this button can break or malfunction as one MacRumors forum user found out. The user, iwayne, posted a photo of the notification that pops up on your screen. In it, the notification lets you know about the problem and automatically turns on "Assistive Touch," to give you a virtual home button. You can see for yourself below.
— MacRumors.com (@MacRumors) October 15, 2016
Though this notification is only a partial solution to the problem (you'll need to get your iPhone fixed or replaced if this happens), it's good to know Apple is at least trying to be proactive.