Rob, thanks for the great article and reminder of the importance of winter traction, especially in an all-wheel or 4 wheel drive vehicle. All wheel drive doesn’t give you traction on a slippery road, it just means all four tires can lose grip! As an employee of a major tire company, I like your last line the best - “May your used WINTER tire shopping…” (not the used part though…:)), throughout the great article, you said ‘Snow’ tire - Winter is the preferred name, as many folks need to tackle ice, slush, cold wet roads, etc., not necessarily snow-covered. The compounds used today include much complexity for all conditions, including the ‘void’ for snow. Older tires, which we called ‘snow’ tires, had aggressive tread for traction and lots of ‘void’ areas for the snow to go - think about how traction is attained, the rubber MUST get to the road, so the void is where the material - snow, slush, etc. goes to allow the tread to get to the hard surface. Today’s tires must also have siping for grip on ice, compound that works in slightly warmer temps, and a design that evacuates water, etc., so technology has come a long way since I started in the industry over 30 years ago! Thanks again for the great piece.