Last I looked, Jan 2019 USB C is still more of a esoteric than a standard. By the time it becomes standard this Mac will be on the "vintage" list given how Apple does things, and the fact that the so called benefits of USB C don't out weight the cost of the peripherals means that most people will continue to use the current tech.
Really? Every laptop has a port and there's tons of peripherals for it. For those that aren'T there are adapters