Explore the paradigm shift in modern web architectures towards asynchronous and reactive patterns in this conference talk from NDC Oslo 2021. Delve into the central concepts, core ideas, and corresponding manifests of the reactive paradigm, gaining a comprehensive understanding of its potential. Examine concrete patterns such as event-centric persistence, hydrations, projections, and fully push-based designs from end-to-end. Analyze the advantages and challenges of reactive architectures based on real-world customer projects, and learn to discern when this approach is most suitable for building cloud-native, highly responsive, and resilient applications. Gain valuable insights to make informed decisions about implementing reactive architectures in your own projects.