I'll put it this way. Svelte is like Kotlin. It's modern, elegant and a pleasure to work with.
React is like Java. Old, bloated and a pain to work with.
Svelte makes React look like it was built by masochists.

I don't work on frontend often, mostly because I despise the frameworks.
Svelte is a breath of fresh air.
I just want to ship a product quickly and it doesn't get in the way.