Thanks, did not know that. What would you recommend?
All seasons are merely adequate in snow. Most people don't want to own 2 sets of wheels/tires so there's all seasons.Tires inherently can't be great in all seasons. Not only the tread, but the rubber itself must be different to be great in summer (stiffer) or be great in winter (softer).
So if you live in a northern climate with rough winters, the best thing is two sets - one set with summer or all season touring tires, and a winter set.
Just remember cost is curtailed by the fact that you're only wearing out one set of tires at a time thus extending the time you get out of each set.