You mention MMO's yet they do this kinda thing regularly. As for grind? Even if they brought old weapons through you'd still be grinding them up, I'd rather get new gear to level up than constantly upgrade the same gun for ten years, that would be a pointlessly stupid grind, yet you want that over variety? I suggest you disconnect you're gaming system from the net and never update a game ever, that way things stay nice and safe and boring as -blam!- for you.