I know it can be argued, but I prefer the simplicity of the 2D, where you can build a house very easily or a shelter (from mobs) in seconds. Unfortunately both games suffer from rampant abuse of dynamite.
So the 3D doesn't limit it, you simply prefer the simplicity 2D provides. The 3D makes the game more complex, and thus less enjoyable for you.
Frankly I think the biggest thing holding MC back is the world height restrictions. In minecraft it takes like 30 seconds to go for surface to the bottom of the map. Terraria, it takes god damn forever. The map is IMMENSE.
But of course, MC has always been more of a creativity hub, where as Terraria appeals more to adventuring/exploration.










