I'd say we're overdue for replacing USB with an uncluttered external PCIe standard for high-speed external devices. The easiest way to understand the differences between USB-C vs USB 3 is that one describes the connector (USB-C), and the other is the data transfer technology (USB 3).
To hell with USB's original mission of being cheap and cheerful. Expensive connectors, expensive cables if you get fully wired ones, relatively expensive chips and circuit design if you want to support all functions at once. Other advantages include the reduced number of connector standards and backwards compatibility. The USB 3.0 connector is designed for USB SuperSpeed applications however, it will carry data from slower speed connections, and it is. However, the USB 3.0 A-type has additional pins that are not found in the USB 2.0 & USB 1.1 A-Type. USB 2.0 was able to transmit data at a maximum speed of 480Mb/s while the USB 3.0 connectors can reach speeds of up to 5Gb/s. This connector is similar in size and shape to the A-Type connector used in USB 2.0 & USB 1.1 applications.
So now we have those two dedicated RX and TX pairs, a bunch of auxiliary function pairs, the USB1/USB2 legacy pair and a couple of other things cluttering the type-C connector. The primary advantage (and difference) of USB 3.0 over USB 2.0 is the increased speed. But this wasn't compatible with USB's original objective of cheap cables, cheap connectors and cheap chips. Much of this mess would have been avoided if USB had been designed with dedicated RX+TX pairs instead of time-shared multiplex over a single pair. A short while later, the original "full speed" 12Mbps turned out to be insufficient for many mainstream uses and we got USB2 aimed at displacing FireWire 400/800 in the medium-speed external interface arena. 20977730 said:it could have been done when USB was introduced 100 years ago.Part of the reason USB is the convoluted mess it has turned into today is because it was originally designed to be a low-cost replacement for the dozens of proprietary and legacy low-speed serial/parallel standards scattered all over the shop back in the day.
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