Yes! I've been a full-time React developer for about 5 years, and recently had the chance to try Svelte on a small pet project. I'd written most of the project in React and had a free weekend so I figured what the heck – let's see how it'd look in Svelte. :)
Within a day most of the functionality was in place, and the code just felt _beautiful_. I loved that it removed so much boilerplate (wrote some examples here[0]), and some of the React headaches (like using "Undo" in a controlled <textarea>) were just gone. The ergonomics (especially the built-in stores, error handling, and <svelte:head>) were lovely surprises!
I'm really bullish on it and so happy it's starting to grow.