Chris Kelly pointed out that he likes to preserve his Discover Weekly playlists like so:
I liked the idea so I added a new Smarter Playlists component to make this happen. The component is called Save to New Playlist.
With this new component you can save your Smarter Playlists to a new playlist that is tagged with a date or timestamp. It makes it easy to make the completist Discover Weekly Archiver that Chris Kelly likes:
Thanks Chris for the suggestion!