If you’re updating the whole post, I think bloggers should create a brand new post and link the old to the new. I know, you’re starting over with no “link juice,” but at least it’s clear to the reader that the post has gotten a makeover. I remember reading a new post of yours a few months. I was about 25% through it and thought “man this sounds familiar.” So I checked it out on archive.org and realized that you had updated and republished it.
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