They have limited utility of you have a short commute, IMHO. Otherwise go for a hybrid if you will be in lots of traffic or sitting for extended periods.
A local PD has a few of the hybrid Explorers which usually are sent out on traffic units and road work details. They said once parked on your average traffic stop, accident investigation, etc. the engine will shut off and they can run the lights, radios, computers, etc. on the battery. In that case the savings can add up.
So do gasoline powered vehicles. EVs do not make power, they store it from another source, usually fossil fuels.