Wow. Folks tipping the advent of electric brakes are displaying the sort of STEM ignorance that's evidently rampant in the populace, as evidenced by the spread of absurd conspiracy theories any high schooler should be able to call out as obvious bunk...
Consider the force operating on disc pads, and the percentage variation of that required for fine modulation - now imagine actuators small enough, powerful enough, and efficient enough, and also a feedback system capable of allowing for fine modulation.
Pffff. Never gonna happen. Even if it was possible to get to the proof of concept stage, bulk and complexity would be prohibitive. But let's say technology is sufficiently magic to make it all light and sleek - the expense would be utterly horrific, especially in light of the fact it's far from clear what problem is being solved by going from hydraulic to electric.