Transforming a Next.js page to allow for personalization without creating multiple versions of the page or needing complex workarounds is possible using Netlify's Next.js Advanced Middleware. This technique enables transforming both the rendered HTML and props data, avoiding React hydration errors that occur when server-rendered markup does not match client-rendered pages. By utilizing middleware, users can customize what's displayed per user without requiring full server-rendering strategies, making it an ideal solution for personalization, split testing, and A/B testing.