I've driven at -5C with heavy oncoming wind and got 10% worse efficiency to summer. The idea that EVs are unusable with heating on in the winter is FUD spread by people with an agenda, simple as that.
Or maybe people who have a different concept of "winter". If you have a heat pump system (not everyone does) then -5C is fine. But -5C isn't what the temperature was where the situtation happened as mentioned in the title of this thread.
Yes. People living in Alaska, Siberia, or maybe Northern Finland, are unlikely to buy EVs anyway: not only temperatures can go down to -35degC regularly, and -50degC peak cold, distances are long so a "short trip to neighbor's for a coffee" might be 300km one way, without civilization in-between. People want to be self-sustained so they will have their own tanks of gasoline/diesel, maybe thousand of liters/gallons, and some old-ish car they know inside out and can service on the road. Number of such people is also counted in thousands, not millions, so totally irrelevant in the big picture. EVs are clearly not for them.
This leaves EV use in a bit more inhabited areas: say Southern Canada, obviously USA as whole, Southern / up to mid Finland for example. And that would limit the temperatures to usually down to -25degC or so, and maybe -35degC absolute peak. And this is within the realm of possibilities for current EVs, as long as you plan ahead a bit and know the limitations.
Of course, having to plan ahead sucks; limitations sucks. On the other hand, if you have to endure with
some limitations for a week or two every 2-3 years, maybe it's not too bad. Nearly all so-called "failures" are not actually total technical failures, car stopping midway, just car losing 10-20% more range than in cold yet bit less extreme weather these same drivers have experienced before. I mean, if you have already driven in -15degC and noticed your range dropped by 30%, then maybe it's a stupid idea to assume it's not going down much further at -30degC, and to assume every charging station in existence is always operational.
But there have always been people who get stranded even with a gasoline car because they are out of fuel. Even such trivially simple planning with huge safety margins (like, the range is 800km, stations available every 50km) is too difficult for some.