We currently store feature-linked annotations in a different feature dataset than the features that the annotations are linked to. This is because we use a different projection for the annotations in our maps than the features themselves. I see in the documentation about annotations:
"A feature-linked annotation feature class inside a feature dataset should link to a feature class within the same dataset."
I'm just curious why this is required and what behavior should I expect if we don't store the annotations in the same feature dataset.