I have a 171 and it is blizzard and straight winged. There are still some non-blizzard, concave rimmed beefier versions out there as well.
My 171 straight wing is a bomber. Flips a bit and glides far.
To answer one's question, some people would want these to help identify less stable destroyers to fill a slot in a cycle
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Yes! This is exactly it. I have bunch of beefier (or "typical") ones also but they are for different type of shots. These blizzardy rims should be the max distance discs in calm conditions. Not going to challenge head wind with those!