This is a pretend problem. When have EVs ever caused rolling brown outs?

Grid can't handle the current of all the cars charging at once? Charge them slower. Get a battery bank for your home to smooth out the demand curve. Throw banks of supercaps at fast charging stations. Fix the fucking grid as you go. Use battery banks on the grid to even out demand at any level. Hell, you can use the cars themselves as battery banks and bring back rooftop solar tax breaks

It's a fake problem, our grid and production do genuinely need work, but in practice EV adoption hasn't been a limiting factor at all