Annotation vs Grease Pencil I'm new to Blender (2.9), just getting through the docs, and also new to animation.

An annotation is extra information associated with a particular point in a document or other piece of information. –Wikipedia

It seems like Grease Pencil can do everything that Annotation can, and more, and I'm hoping for some insight as to the role and practical usage of Annotation, as opposed to Grease Pencil.
The main difference is that annotations are meant to be notes, or sketches for reference only. There is no way to render them and cannot be animated.
Grease pencil objects are renderable, and can be animated. They are designed as a &quot;hand drawn&quot; animation tool in a 3D environment.