One of the SEO things I noticed I need to do is to promote some of my blog posts to pages. My logic here is that blog posts are by definition news-like content. If a blog post gets evergreen properties and needs updating, I will bump up to page status.
Blog posts will only be updated for broken links. They might also get a link to a newer, more updated content.
Pages will however be constantly updated based on their decay time.
Markus Ossi 