This document discusses considerations for deciding when to switch a Drupal website to version 7. It outlines reasons one may want to upgrade, such as improved user interface, database support, and scalability. Key factors that should influence the decision include the site's complexity, developer experience, available time and budget, and whether it is a new site or existing site upgrade. For new sites, Drupal 7 is recommended unless third-party modules are not yet supported. For existing sites, upgrading is recommended if the site and developers are experienced and resources allow, otherwise it may be best to wait.