Your comprehension of this technology is so limited that you actually think that’s how it works.
The letter simply indicates that the physical wiring in the cable is different to a previous iteration of the USB standard. There isn’t a great deal of reason that they would change that now it has a pretty good potential for energy transfer and high data transfer speeds. In 15 years they might be looking at changing it but not any time soon.
Usb and B came out at the same time in the '90s for god’s sake.