User blog comment:The5lacker/Varus is not a normal AD carry/@comment-4452268-20130615004005/@comment-1120494-20130620114640

Hey Fegazeus, since when is getting Magic Resistance easier than Armor?

In reality, everyone buys armor items, if he needs them or not. Even vs 5 casters they buy armor, rofl, simply because there are lot of nice armor items out there.

But most MRes items arent good or dont fit in builds. Just try Magic on top, mid and jungle. Every enemy will still buy armor vs adc and die vs the magic-dealers. You simply win more games with magic damage than with Physical damage for above reasons.