Matthias and Annie discuss real-life use cases of decentralized identity. They explore two categories of decentralized identity use cases: those that radically change the relationship between individuals and organizations, and those that solve specific problems using decentralized technology. They highlight the eIDAS 2.0 regulation in Europe as a driver for decentralized identity adoption and mention the importance of interoperability testing. They also touch on the potential use of decentralized identity in supply chain management and the need for open and interoperable ecosystems.