Svelte is different from a framework or a library in the sense that it is really a compiler that creates small components for your application. Those components are already optimized for the browser.
Offering a good experience is better and more rewarding than any JavaScript framework. Thus, maybe, your users don’t need fancy features but a working app where they perform their tasks and a server side framework is good enough.
JavaScript Frameworks and libraries usually get a lot of attention at their birth but their lifespan is very short if we compare them with other popular frameworks and libraries in other languages.