Personally, I think they overstate the power delivered, the rechargeable longevity, and the replacement costs. Frozen climates, extremely hot and humid climates, salt and sea air.....not much experienced history that can be tracked here.
I’m sure there are other undiscovered costs associated with disposing of useless packs, also. Right now, this is all just another peg in the socialist takeover of this country, IMO.
If you only account for the engine, then electric is more efficient on basis of fewer energy conversions from the electric motor. If you include the power plant, or the source of electricity, compared to the petrol, then there is far less of a gap in energy efficiency, because there are comparable numbers of energy conversions. I just don’t like a large laptop battery, which you should not break open, or liquid fuel which burns for a long time. Gas fuels rise and disperse, and burn off fast in a leak, meaning you get exposed to way less heat if a CNG car breaks and leaks.
As a note, having an additional heater for your car, or a heated garage are common extra costs for running an EV. But for someone with the money to buy an EV, they usually are not a big deal.