I definitely agree. I was recently (last week) going through old releases, and I found a bunch of broken links to the release notes under Debian's news section on the Wiki, and was surprised at how many were 404.
(something something Cool URIs don't change[1] something something - I can't figure out how to best put this link in without it looking snarky, truely it's not meant to be snarky, just the first thing that came to mind. One interpretation of this is to set up redirects as required from old pages to new ones, even if it's a redirect to the mailing list archives)