It takes about 10kWh to displace one gallon of gasoline (gasoline car gets around 30-40mpg, an electric car like a Model 3 gets 4miles per kWh). The US currently consumes about 575 GW electricity on average over a year. The US consumes about 369 million gallons of gasoline per day, which works out to about 154GW steady state average electricity. Increase that by, say, 10-20% to account for distribution and charging (not counting the fact that this is offset by electricity being delivered by wires and not by fuel trucks which need fuel themselves), and we’re at 32% of US electricity to displace all the gasoline we consume. Gasoline accounts for most transport fuel (diesel is about 128 million gallons per day in the US), so yeah, I’d say I’m pretty close to 50% of current electricity.

Battery-electric vehicles are better able to flexibly adjust use of electricity during time of day than other large electric loads like air conditioning (which tend to be used en masse at the same time of day with little flexibility) that drove much of the growth in electricity demand when we were doubling electricity production every decade, so I’d say we’re pretty well off overall.

So what’s the need for histrionics about “complete nonsense”?