That's fair and I've certainly experienced this where I live, which is north of Buffalo in latitude. Also frost heaves are no joke in non-city/non-highway roads and present another obstacle to FSD. I guess my point, if I had one, is I would hope FSD would be programmed to be as conservative as possible in adversarial winter conditions and not overreact to such conditions and that alone is enough to increase safety because humans, for various reasons, are not conservative enough. Hard to imagine for sure.