Is the source code the same when changing to a new engine?
From Whimsygames
“One of the key differences between Unreal Engine 4 and Unreal Engine 5 is the evolution of scripting languages and capabilities. In Unreal Engine 4, the primary language was Blueprint, a visual scripting system that allowed developers to prototype and build complex game mechanics without deep programming knowledge, while C++ was available for those looking to dive into more advanced functionality. However, Unreal Engine 5 significantly enhances this foundation by integrating additional programming paradigms, broadening the scope of development. With improved C++ support, developers now benefit from a more streamlined code management system and better performance optimization, which are essential for larger, more complex projects. Features such as the enhanced gameplay framework and collaboration with more advanced libraries allow developers to create more dynamic interactions and sophisticated gameplay experiences. The combination of these capabilities not only provides a more accessible entry point for budding developers but also equips seasoned programmers with the tools to push the limits of what can be achieved within the Unreal Engine ecosystem.”