Was thinking the same myself, depends how hard wearing they'd be really! Having said that my aunt and uncle use wintracs year round on their jags, a set lasts a couple of years
To be honest, my AT's don't have many more than the Grabber's on reflection, and my AT's are shocking in the wet! They were pretty pathetic on the very limited snow we had last winter too, although I did improve on my drifting skills in that time