Hi,
You may have noticed recently that some links like https://www.mediawiki.org/wiki/Special:Code/MediaWiki/1 redirect to a new static dump of code review pages (e.g. https://static-codereview.wikimedia.org/MediaWiki/1.html) to preserve the comments that often provide an important historical record of why certain changes were made (or not made).
There are still some tweaks to be made done to the redirects as well as the dump pages themselves, that's tracked at https://phabricator.wikimedia.org/T205361.
But I think we're at the point where we can start saying our goodbyes to Special:CodeReview and begin the process of undeploying it: https://phabricator.wikimedia.org/T116948.
Adieu!
-- Legoktm