We DO have double pane windows. Just not in areas that have middling weather. Or construction before 1990 or so. Or in older mobile homes, which we have a lot of. And the houses with double pane windows are often poorly constructed, sometimes in the homes, sometimes in the windows, and often both.
Energy has historically been very cheap here, so efficiency has never been a priority. That is changing now.
The videos I’ve seen of northern European windows just seem to have a ton more features than ours.
Y’all need to learn how to sanitize your inputs!