With the recent release of Remix SPA mode, migrating your React Router applications to Remix has never been easier. In this talk, we will define some use cases for both Client-Side Rendering and Server-Side Rendering and explain how Remix's opt-in model to build features allows you to own your architectural decisions fully. We will also discuss how you can gradually migrate a purely Client-Side Rendered React Router application to a Progressively Enhanced Server-Side Rendered application and all the benefits of migrating to Remix for the user experience and developer experience.