Spoiler alert: he made the list.
As previously mentioned, the blogroll stores entries using a custom post type then displays them by way of a shortcode which can be placed on any page. Each time the shortcode is triggered the blogroll.opml file is recreated so it is always up to date.
I have updated the site footer to show links to both the directory and blogroll. The directory is still valuable for discovery purposes but nothing beats explicit recommendation.
The plugin is available on GitHub - usage and styling info is in the readme.