One thing I think about a lot is the marginal source of a kilowatt-hour. Even if your grid is 90% solar/wind, and 10% coal, if it's the coal that is scaled up or down with demand, then every use of electricity is using coal power and the reduction of any use of electricity is going to reduce coal burning. Agree with you anyway that electric cars are better than gas cars for the trips that remain necessary.
One thing I think about a lot is the marginal source of a kilowatt-hour. Even if your grid is 90% solar/wind, and 10% coal, if it's the coal that is scaled up or down with demand, then every use of electricity is using coal power and the reduction of any use of electricity is going to reduce coal burning. Agree with you anyway that electric cars are better than gas cars for the trips that remain necessary.