Sveltekit was a bit of a pain to get running, but using svelte itself has been insanely nice. I got an entire internal website up and running with a bunch of cool functionality in ~3 days. The state management with Redux alone would have taken that long if I was using React.
Being able to just use regular HTML is also nice.
There are some gotchas, how it handles CSS is kinda weird, and docs beyond the basics are rough in places.