The new Gatsby Image CDN feature is now available in beta and can significantly reduce build times for large Gatsby sites or those with many images, by offloading image processing to a dedicated image CDN. This allows developers to add responsive, optimized images to their sites in modern formats without slowing down site builds. The feature is currently supported on Netlify and is implemented using Netlify On-Demand Builders, which means the image is processed for the first visitor and then served from an edge cache with no need for further resizing. With this feature, visitors get the most optimized images while site builds become faster, making it a popular approach in web frameworks in 2022.