The document outlines the changes made in Kaseya's OEM architecture from version 6.3 to 6.5, transitioning from individual integrations to a unified generic driver for managing OEM products. The new architecture simplifies maintenance and operations, allowing tasks such as backups and virus scanning to be managed more efficiently. It also highlights the implementation of data-driven catalogs that contain essential information for using third-party products, with an SDK expected in the future for partner engagement.