The Jamstack is shifting towards "getting back to basics" and partial hydration of websites. Vite is a build tool that makes component hydration easy, and 11ty is a static site generator that supports HTML templates. The authors explore how partial hydration can be achieved using Vite and 11ty, and introduce the concept of an "opt-in" JavaScript switch. They also discuss islands architecture, where every shortcode is a mini component tree with its own hydration strategy. The goal is to make JavaScript bundling more efficient while still maintaining interactivity. Emerging tools like Slinkity, Astro, and Iles are mentioned as alternatives for partial hydration.