The document discusses keeping software architectures relevant through the use of domain-driven design and emergent architecture. It advocates establishing bounded contexts to achieve focus, communicating through a shared language within contexts, and collaborating through modeling and storytesting. The key principles are to establish context and focus, advocate instead of translating between domains, encapsulate instead of coddling, simplify designs to amplify understanding, and architect systems as shared stories. Following these principles allows architectures to remain relevant to stakeholders through changes.