What are the main disadvantages of Unity for game development?

The main disadvantages of Unity3D in game development include performance limitations in high-end graphics or complex games, where Unity’s rendering may lag behind Unreal Engine. Unity3D projects can produce larger app sizes, affecting mobile performance. Pricing for Unity Pro and Enterprise is costly for some teams. Unity’s interface, while versatile, may be challenging for beginners, especially when custom scripting or third-party plugins are required for advanced visual features.