You can _kind_ of do this now, but it's excessively manual. I agreed that it would be awesome to have the AI figure out what you mean to iterate on a given image.

I recently had a somewhat frustrating experience of having a generated foreground thing and a generated background that were both independently awesome - and trying to wheedle Stable Diffusion into combining them the way I wanted was possible, but took a lot of manual labor, and the results were "just ok".