It’s mentioned in the article. You generally expect something like a 20% range drop. With the range that you get these days (looking at you KIA EV6), it’s really not a problem.

Also, an EV never fails to start in cold weather. Which is a definite plus.

Most of Norway (or at least the parts where most people live) doesn't actually get that cold, thanks to the Gulf Stream. Certainly not as cold as the colder parts of the northern US or Canada can get.

Car batteries are temperature controlled, and have been for quite a while now