I've got a multipage site with a blog page. When I open a blog to read it, it opens without the main menu bar and footer.
Because the current format means the identity of site is not visible at all! If people find the blog via social media for example, with a link to a specific blog post, they will probably not click 'return to site', and will not associate the post with site, nor engage with social media links in the footer.
When a blog post is open, I want to be on a page that is identical to the rest of the site - with the same top menu, same footer etc.