These were exactly the things that drew me to Svelte as well. And yes, the author is right. If they had claimed that you should use Svelte for everything I would have immediately stopped trusting them.

Svelte is very nice for backend engineers to use for a frontend framework. It makes way more sense from a mental model, and it’s incredibly lightweight, at least from what I’ve seen in other frameworks.

It’s the exact same way I feel about Ruby. You definitely shouldn’t be using it for everything, even most things, but the stuff it’s good at it beats Python by a mile. And it’s so much more pleasant to use.