Gas engines needing to be plugged in or they don't start isn't relevant to why I can't trust an EV in the winter, it's the 25% loss of range at -8°C, and not wanting to get a hotel and stay somewhere overnight so that I may have the privilege of spending up to $0.41per minute to charge my car overnight so that I can make it home in winter, vs my current hybrid, where it takes 5 minutes total to stop at a gas station to top up my fuel.
And actually, the Government of Canada states that most consumer heat pumps tend to need supplemental heat around -15°C to -25°C, with only the most expensive "cold weather" variants managing anything colder.
See screenshot as I can't hyperlink to the exact line in question stating that.