I think it will take two to three decades to get to 50% EV penetration (percentage of full EVs of total cars in use). I expect that this will be enough time to commensurately improve the grid and build out more renewable energy and possibly nuclear. Adding solar and wind energy power plants currently cost about the same as adding more natural gas plants, and are much less expensive than coal. There are environmentalists who view the actions of 1970's environmentalists as ultimately being damaging to the environment by blocking expansion of nuclear energy. But we do need to improve the grid, and add grid storage. Money and people are currently being thrown at this.
We may have to agree to disagree! In any case, time will tell.