Matt Edmonds of Splash Damage Games takes a qualitative look at the Gameplay Abilities System (GAS) to help decide if it’s right for your team or project. Then, he switches gears to deliver some quantitative examples to help drive the workflow home.
https://dev.epicgames.com/community/learning/talks-and-demos/nRW/using-the-gameplay-ability-system-unreal-fest-europe-2019-unreal-engine