Khaled Garbaya's blog post explores the transition from using create-react-app to Gatsby.js, highlighting the advantages and key differences between the two. While create-react-app simplifies the process of starting a React app by preconfiguring tools like webpack and Babel, Gatsby is a static site generator that offers a more comprehensive framework with built-in best practices for creating Progressive Web Apps. Gatsby provides features such as code and data splitting, which enhance performance by loading critical resources first, and utilizes a flexible plugin system to integrate various data sources. It leverages React components for reusability and uses GraphQL for efficient data sharing across pages. The blog post also discusses the process of converting static and dynamic routes from a React app to Gatsby, using examples like blog posts loaded from Contentful. Gatsby's ability to build static files allows for easy deployment on platforms such as Netlify and AWS S3, and the post concludes with references to additional resources and documentation for further exploration.