To my understanding, one of (or the singular) author of Svelte was a developer for the NY Times who wanted to easily create visualizations with thousands of data points, and the existing UI libraries weren't cutting it on performance. Depending on the types of applications you build day-to-day, this problem space might be niche. Your standard CRUD app (tables, forms, etc) would not be leveraging Svelete's capabilities; in a sense, it could be a pre-mature optimization.