They didn't. They simply made one, because this what the tech blog industry has decided should come next. They didn't solve anything.
Samsung is another good example of a company that doesn't try to solve problems, they make what people think they want, flaws and all, because people don't think about the flaws until its too late.
Apple instead takes the heat from what people think they want, and then deliver what they actually want, whether they know it or not.
Wireless charging is my favorite. Its anything but, and is a ridiculously poor implementation...but, they can call it wireless charging, and people think they want wireless charging. No one actually wants proprietary charging mats, or finds that to be a good experience...but hey, the box said wireless charging.