When long-time modders and data miners look at the jump from to FIFA 19 , they aren't just seeing a graphical update; they are witnessing a total reconstruction of how the game functions.
In the FIFA 09 era, the game relied heavily on a simpler file structure. Much of the game's logic and database were contained within accessible archives. The devdata files (and similar configuration containers) were relatively easy to parse. devdata dat fifa 09 19 better