I will probably reskim the post, but in general it’s not clear to me that editing content into a preexisting posts is better than incorporating then into the next post where it would be appropriate. The former provides the content to all people yet to read it and all people who will reread it while the latter provides the content to all people who yet to read it. So you are trading the time value of getting updated content to the people who will reread this post faster at the expense of not getting updated content to those who will read the next post but not reread the present post.

I don’t have readership and rereadership stats, but this seems like an answerable question.