A personal favorite:
"Xcode now pins elements of your code structure to the top of the editor as you scroll through a document. To toggle this behavior, use 'Show: Code structure while scrolling' in Xcode’s Text Editing preferences."
This particularly helps with large files.
@8x5clPW2 used to be able to exit after visiting four, sometimes five basic blocks. now, find yourself in loops with variants you don’t know what to do with, wondering ‘how did i get here?’