Uh. Ok, to dissect this I'm just going to ignore the whole list thing and just say I never disagreed that Borderlands was similar to this game. You want to use that as the example instead? Fine, let's use that as the example. It makes no difference though. The concept of weapons getting left behind is scaled by how many levels there are, and the difference they make, not how many weapons are available. There could be just two weapons in the entire game, and if one is level 20 and the other is level 40, then the level 20 would naturally get left behind in lieu of the level 40.