So you are talking about de-constructing and re-constructing articles.
Essentially. Taking older content and updating it to reflect newer knowledge learned since the original or previous version of a post. Maybe including an image you like better than what you used earlier. More than copying and pasting, though (that's just lazy). It's not a total rewrite, but it's enough to qualify as new content.
In recent posts where I took a comment and expanded it for a wider audience, I tied it to an comment I was trying to make to someone. Should I go back to these posts, I could rewrite them in a way so that they read as pure posts. By that time, there is distance between me and the time I made the original comments. This I haven't done, but the raw material is there for when the time comes.
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