Why doesn't iPhone7 use USB Type-C interface?

when apple introduced the Lightning interface four years ago, there was little opposition. after all, many people were not very satisfied with the microUSB interface. At that time, the interface only needed the specification of USB2., and the transmission speed was slow, and it could not be inserted forward and backward at will, just a little more convenient than Apple's ancient 3-pin interface. At that time, after the appearance of Lightning, this interface, which covers a smaller area than microUSB, quickly won the favor of consumers, mainly because the forward and reverse plug-in is reversible, and the plug-in line need not be so troublesome.

later, the USB3. specification became more and more popular, and microUSB also provided the transmission speed of the USB3. specification and provided backward compatibility. However, the speed is faster, but the experience has not been completely improved. Therefore, until the release of the iPhone 6s, Apple's Lightning interface was the best interface among consumers.

With the appearance of USB Type-C interface, it occupies less space, and has become the standard USB interface for a large number of devices. The speed can rise to the USB 3.1 specification, and it also supports reversible forward and backward insertion. The whole industry is extremely hot, and a large number of related connecting devices and accessories have landed on the market. So, isn't it more meaningful to use USB Type-C interface on iPhone 7 now?