Event sourcing is attracting more and more attention. This is partly due to the growing interest in domain-driven design (DDD) and CQRS, to which event sourcing fits conceptually well. But like everything else, it is not a panacea: There are scenarios for which event sourcing is excellently suited, and others where it is not appropriate. Golo Roden examines the scenarios involved and discusses the advantages and disadvantages, identifies risks and dangers, but also opportunities and possibilities. If you are not sure if event sourcing is the right approach for your application, this session is for you!