Actually, I was new to the entire stack, but it went smooth as butter. (Though I have plenty of experience with JS, HTML, CSS, other databases, etc.)
IMO, svelte and sveltekit are well designed and have a great dev experience.
LOL, as I was writing this he was apologizing on the stream for the breaking changes. That was a bit of a pain, but not really that bad. My only real gripe is using folders to organize both layout hierarchy and route hierarchy is going to turn out to be a mistake.