My collector insurance allows for year round if you want, it was so cold just before Christmas, saw a number of collector vehicles out driving.
At sub zero temps things get super dry, and if roadways are clear, yu can get away with a little driving without damage. My route is on my road and a bit of the highway, only when dry and cold, no issues.
Its temps like 20f or so and higher the salt, slushy and filthy stuff starts,
Today cleared some snow, it is totally powdery dry, very clean, and lighter.
I know that Bob, he is just fired about about the BBQ party...