If you think that, you're not familiar enough with modern games as a service. Fortnite lives on the latest version of Unreal Engine, and Unreal Engine changed a

If you think that, you're not familiar enough with modern games as a service. Fortnite lives on the latest version of Unreal Engine, and Unreal Engine changed a lot from the initial Fortnite development until now with many new features, rewritten parts, and major refactoring of other parts. It's huge and constantly evolving, so it is similar to, i.e., browsers.