Gatsby has released Blog Theme 2.0, which brings new features and customization options to the popular gatsby-theme-blog. This update includes enhanced image support with featured images and social sharing capabilities, improved SEO, and easy webfont configuration. Users can now highlight lines in code snippets using Theme UI's prism package, and styling presets allow easy aesthetic changes without requiring in-depth design skills. The release also introduces gatsby-theme-blog-core with unstyled components for more flexibility and separates the dark mode feature into a standalone theme. These enhancements aim to provide more tools and customization options, encouraging the community to create innovative and diverse sites, with updated documentation and tutorials available to assist users in leveraging these new capabilities.