It helped me to understand a couple of the questions that arose about 'why I cant clone or paint etc' in RAW, when I read that RAW files by definition cannot be edited, only non-destructively manipulated at pixel level. (That is why they are admissible as evidence in court).
Al the RAW editor can do is change the values held for each pixel, although you can crop of course.
I know this doesn't answer all questions, but hope it helps.
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