I see a real advantage of lightning with respect to USB-C for its mechanical design: lightning is a male connector and, if forced, the damage will be mostly done on the male connector plug, not the female socket housed in the iPhone, which is engineered to be quite stiff. USB-C connector is a female plug that surrounds the male part housed in the phone. If that part is damaged, repairs would be more expensive than just buying a new cable as with the lightning situation. It is important to note however that lightning sockets, since they do not have anything that precludes FOB from entering the socket, while the usb-c has at least the inner part that makes it more difficult for the socket to be filled with dust.