I only have 4wds, and because I have lived all over the US and Canada, I know to keep it in 2wd on snow and ice.
Unless everyone stays home you're gonna see a lot of vehicles, especially trucks, plowed into guard rails along the roads. Happens in the Dallas area whenever the roads get icy.
The worst is on bridges. Some drive along too fast thinking this is not bad. They come to a bridge, start sliding, and hit their brakes. Only experience teaches you don't do that but they have no experience.