Q: can you tell us what the "finder swap" is? i've been thinking about it for the past six months
A: that's probably when you are working in a content creation program and you change one of the files it's using outside the program while the program is using it. and watch all your subsequent work take effect now on a different, changed version of the starting file(s). this could be useful if the program is too bogged down by a heavy project, might be quicker to just make nudges to the files outside the program, where editing will be quicker and more responsive. and then swap it in and re-render. also extremely useful for making re-edits for different aspect ratio