Back in November 2020, ContextLost made a post about deprecation of middleman functions such as AnimationController:LoadAnimation().
The documentation on Animator:LoadAnimation() still reflects old advice, however, recommending players to use AnimationController:LoadAnimation(), and etc.
Adapting the page to reflect the new advice from ContextLost would help new developers understand exactly what they are doing with Animators and AnimationControllers in Roblox.