I still want to access the old blogs occasionally.
I can track some down using a Google search because I happen to remember the author and the subject. But what if someone wanted to browse or search the blogs? What about the 'how to' articles or 'industry insider' features? I know where they are by using Google searches (I remember the necessary keywords in a lot of cases) but they are not findable, navigable or searchable within the site.
Some of these important gems should not be 'buried' or left to the user to page forward hundreds of pages in the news section in the vain hope of accidently finding what they wanted.