The problem is is that all the marketing for tire companies and their all season tires has convinced people that snow tires are not necessary. Every all season

The problem is is that all the marketing for tire companies and their all season tires has convinced people that snow tires are not necessary. Every all season tire on the market starts to lose performance characteristics when the temperatures drops below 40F. You can not have both "long tread life" and good performance below 40F in the same tire. Even if you don't have snow the performance is worse below 40F for all season tires compared to "snow" tires.