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Cold-weather range hits aren’t as bad for EVs with heat pumps
(arstechnica.com)
This is a most excellent place for technology news and articles.
Yes, resistive heat is expensive, but that's only part of what makes heat pumps in cars more effective. They don't just heat your cabin, they heat your battery so you maintain range while it's cold out. Here's an article with more details and some pretty infographics.
The heat pumps also preheat the battery so it can charge in extreme cold.