Many websites change over time. Archive.org maintains a database of captures of various websites, which users can navigate, to see earlier versions.
It would be great to be able to access previous versions of websites which have been saved, as well as to have regular updates which check for changes, and then save a new version (or capture) by date if a change is found.
To offset the additional computing power and storage this would require, a third pricing plan could be created set at about maybe $40-50 annually.