Yeah its like a cascade once someone spins out. Most drivers who doesn't have chains or 4wd behind ends up spinning out as well. I live near the pass and ski there several times a week and can say that the trucks drive extremely aggressively. The issue is if a truck jack knifes its going to block at least two lanes and require special equipment which takes much longer than a normal tow truck.

This happens every first few snow storms of the year. People drive like morons and trucks don't chain up. Wsdot generally does a good job but I watched the snoqualmie webcam the other day and they had several inches on the freeway at the pass and only had traction tires advised... its early snow for sure but drivers/wsdot need to be prepared, we have amazing forecasting at the tip of our fingers so it's not like this isn't unexpected