Since re-rendering in Svelte happens at a more granular level than the component, there is no artificial pressure to create smaller components than would be naturally desirable, and in fact (because one-component-per-file) there is pressure in the opposite direction. As such, large components are not uncommon.

In my projects on Svelte, we adhere to the "budget" of the component in 200 loc with styles. If the component goes these limits, we just take out styles in a separate file using svelte-preprocess.