As an end user with unlabeled cables, chargers and devices, that encoding may as well not exist. I have 10 chargers, 10 cables and 10 devices. It could be tha

As an end user with unlabeled cables, chargers and devices, that encoding may as well not exist. I have 10 chargers, 10 cables and 10 devices. It could be that only one charger and one cable provides the highest level, so now I have to try 100 permutations to charge something. Also, many cables get flaky after a month or so, so I might have to try the winning combination multiple times. Finally, having the cables form a compatibility hierarchy is some strange theoretical property. We could have every device come with a cable that is mutually incompatible, but have one special cable that works with all devices in a vault at nist next to the standard kilogram, and then we would have a pyramid of compatibility. For instance, I’ve encountered situations where I need two different USB-C cables if I want video out to HDMI to work on two different laptops.