Vercel Ship & Next.js 15: Features & Migration Guide

The recent Vercel Ship event highlighted several updates and new features for web developers. Among these were the introduction of a firewall feature, enhanced security with server-side feature flags, and improvements to Next.js 15. These enhancements aim to optimize application performance and provide better control over costs and security. Notable updates in Next.js 15 include support for React 19 RC, integration of the experimental React Compiler, improved error messages for hydration errors, changes to caching behavior, introduction of Partial Prerendering (PPR), new configuration options for external packages, and a redesigned create-next-app command. These features are expected to make Next.js an even more powerful tool for building modern web applications.