React Server Components vs. Astro Islands: When to Use Each Pattern I've shipped production code with both React Server Components (RSC) and Astro Islands. They solve the same problem—reducing JavaScript sent to browsers—but through completely different philosophies. Most developers pick wrong because they don't understand why each exists. Let me be direct: Astro Islands is better for content-heavy sites with scattered interactivity. React Server Components are better for apps that need frequent