How powerful is UE4's 2d game egine?

I understand. The thing is 2d developers will hardly move from Unity or other engines to UE4, so it’s understandable that Epic continues to focus on what they shine at instead of turning attention to the minority of users. Which is the same kinda thought they use to support a certain platform or not.

Which is in my opinion a big point for Unity, because they are managing to support virtually EVERY platform, to be good for both 2d and 3d games and still grow and improve extremely fast.