I've been playing around with the new generative fill feature and one feature I'd really like to see implimented is the ability to toggle whether or not the fill pulls visual data from nearby artboards. I don't see lot of use cases where it'd be valuable to be able to do that and what often happens is the scraps of visual data from nearby images will muddle the final result.
I often use Photoshop to comp together storyboards and it can get frustrating if I'm just trying to extend a scene in an ocean image and the results come out with bits of brick wall from a nearby artboard. I think a toggle feature would allow you to decide what would work best for your workflow.