Two points:
The question of what magazines or how many I do or do not want to buy is irrelevant to anyone but me, or ought to be, and should remain so.
Those who place any confidence at all in the concept of "grandfathering" should examine Feinstein's 2013 draft ban law and notice that it proposes the licensing, background checking, registering, fingerprinting, and photographing of the persons possessing "grandfathered" prohibited items.
I'm from the government, and I'm here to help you (make you safe); grab your ankles. This is as good a time as any to wake up.