[SixSigma]

> if two ports weren't compatible, then they would be physically incompatible

they have forgotten about poka-yoke (inadvertent error prevention) which is very remiss.

https://en.wikipedia.org/wiki/Poka-yoke

[gurkendoktor]

A problem that Apple used to understand, if you look at their keyboard USB cords:

http://www.mcelhearn.com/images/articles/20060828181525223_1...

I guess the USB-C plug is too small for gimmicks like this, though. Would've been nice to distinguish between USB-C and TB 3.1.

[gurkendoktor]

(For context, that is how Apple prevents people from plugging anything but its own keyboard into the extension cord, or daisy-chaining two extension cords.)