[LeafItAlone]

Possibly because that’s not the job of that parts being talked about. The brake pedal implementation will have to be separate and each brake pedal manufacturer can implement a different style.

One could even see the possibility that different drivers get different response customization, like how many new cars let you save custom seat, mirror, and driving style configurations.

[flyingfences]

That is not the point at all; We're not talking about a spring rate that increases as you push on the pedal. In a proper braking system, the driver can feel through his foot what the tires are doing, because there is direct mechanical feedback through the brake lines. This is an important safety consideration, and manufacturers are throwing it out for... what?

[LeafItAlone]

Yes, and those can all be mechanically emulated at the pedal based on sensors on the brakes, with only an electrical connection between them. You can experience that even on modern arcade racing-simulator games.