Yes, exactly, this is always the same example I give (in my case the 401 here in Ontario, Canada) -- blizzard in the middle of February, lane markings covered, highly unpredictable road surface, spontaneous temporary lanes, cars working at a crawl, snow plows coming through that you have to move over for, and can't pass, cars or trucks jack-knifed or half in the ditch. This kind of thing happens to varying degrees at least once a year, and I honestly don't think that these scenarios are actually properly in the imagination of the primarily-California-based engineers who work on self-driving.
For context, the greater Toronto region is 6 million people, and Great Lakes region from here over to Chicago is multiples of that. Winter is 4-6 months. This is not an insignificant edge case for a small population, and if self-driving can't handle it, no thanks from this driver.