Cold weather heat pumps have only become commercially available in the US in the past few years. Warm-weather ones have been used in some parts of the country for a long time.
This is just nonsense. I live in Canada and we've had them for decades, I refuse to believe that just next door they weren't "commercially available". It's also way colder here, the weather argument is a bit ridiculous. Norway was apparently installing them in 2004.
Try talking to contractors in the US. 2/3 don't have experience installing heat pumps, and will try to discourage you from doing so as a result, or charge a huge premium for learning how.
Oh so now it's not the weather, or the commercial availability, it's "the contractors" and "the experience", or "the premium". Like these other countries didn't have to overcome these challenges with monetary incentives.
This all still means the US is decades behind everyone else lol
Yeah I found this article weird too. I'm in Canada and have had heat pumps for decades. The only likely reason for the US not having them is too little electric generation and too much oil and gas lobbying.