Islands & Server Components & Resumability, Oh My!

A deep-dive comparison of three modern frontend rendering architectures: Islands, React Server Components, and Resumability. Islands reduce JavaScript bundle size by up to 90% by explicitly marking only interactive components for client delivery. Server Components extend Islands with client-side routing and proper state persistence. Resumability takes a different approach by serializing framework state so no code executes on the client until needed, eliminating hydration execution cost. The author argues these are complementary rather than competing approaches, each solving a distinct part of the hydration problem.