After more than four years since the release of Svelte 3, the Svelte team has announced the stable release of Svelte 4, which mainly focuses on maintenance. However, the release still offers significant improvements such as a nearly 75% reduction in package size, resulting in faster download speeds and less waiting time for npm install. Svelte 4 also enhances the authoring experience with intuitive and consistent features. The official Svelte site has been overhauled, offering multiple pages, improved mobile navigation, and a dark mode. Svelte 5 is being developed, which promises major new features and performance improvements.
https://svelte.dev/blog/svelte-4