Nx 15.4 introduces several new features and improvements, building upon the recent 15.3 release, including support for Vite 4.0, Nx Watch for file-watching capabilities, and Webpack-less Cypress support for React Standalone presets. The update enhances server-side rendering with Module Federation for Angular and React applications, promising better page loads and SEO benefits. It also allows running multiple targets in parallel for various projects, simplifying workflows with the nx run-many command. Additionally, Nx 15.4 introduces interactive prompts for custom presets, enabling more dynamic and user-friendly configuration of workspaces. These updates aim to streamline development processes and improve the flexibility and efficiency of managing Nx projects.