Should I migrate my enterprise React application to Next.js 15 for better Core Web Vitals?

Migrating to Next.js 15 is a strategic move if your primary bottleneck is the "client-side waterfall." With the new stable Partial Prerendering (PPR) and the optimized caching heuristics in the latest version, you can serve static shells instantly while streaming dynamic content. In my experience, moving an e-commerce dashboard from a standard Vite-based React app to Next.js resulted in a 40% improvement in LCP because we offloaded heavy data fetching to the server. However, be prepared for a steep learning curve regarding the "use client" and "use server" directives, as it fundamentally changes how you manage state and side effects compared to traditional SPAs. 

Have you considered if your current architecture allows for a gradual adoption using a Reverse Proxy, or are you looking at a complete "big bang" migration? Sometimes a hybrid approach is safer for enterprise-level stability. 

Next.js 15 is definitely the way to go for SEO. The built-in Metadata API and automatic image optimization handle the heavy lifting that usually requires manual configuration in a standard React setup.