I routinely winter camp in my SMD Europa (2 lb - 3 season - silnylon tent). I occasionally get woken up in the middle of the night as the tent sags do to snow load. I smack the top of the tent, removing the snow, and go back to sleep. The Europa would not stand up to really high winds, but I camp in the woods where shelter from the wind is abundant. With some common sense and experience and taking into account the expected and possible conditions many tents can be used to winter camp IMO.
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i really don't think that applies to me.