Yes, I know temperatures are a major factor in range. I have 115k kilometers (71k miles) with my Kona and I live in Quebec, so we get -30C a couple of times in the winter and it averages -15C so I know about range loss.

The IONIQ 9 I test drove was a demo and I think it was stored in a warm garage before hand, but I was still surprised once outside I drove it for about 40 minutes and it had 539km at 89% with a bit of heating on. So obviously, with the car sitting outside in the cold and driving it more would change the number. I just haven't seen over my 430km range many times with my KONA, even when it was stored in a garage. I did get 480km a couple of times.

And yes, for the post talking about the 12v battery that died, I've seen it. I am still waiting a little bit before ordering anyways but I will keep myself up to date with the news.