[d_k_f]

I'm with you, and at least here in Germany this is already the law, though it is only required if your deceleration rate is greater or equal to 1.3m/s² (it is allowed starting at a rate of 0.7 m/s²).

There are already voices against this, as the recuperation functionality of electric vehicles can repeatedly trigger this feature if the driver lets go of the gas pedal for a short time.

[illiac786]

I don’t understand the voices against it: even if it’s recuperating, the car _is_ decelerating, which is why it triggers (and it should). What’s the problem according to them?

[mech9879876]

The threshold can be a problem- you don't want the threshold to be too low, or else the brake lights come on when even slight deceleration is occurring. This would give an annoyingly too-common signal that would possibly be disregarded/ not be an effective form of visual communication.