Brake-by-wire systems could be pushed to the market as hybrid technology becomes more common, according to SKF. While the linked article states that this is "because it is electronic", it would seem that a slightly more accurate reason is that it's easier to provide a smooth and linear braking response with brake-by-wire when regenerative braking is added into the mix. Conventional hydraulic systems offer no easy way to decrease braking force to account for the additional deceleration offered when the regen mode is entered, which presents some significant challenges when trying to maximize energy recovery while still providing an acceptably smooth braking response.

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