I don't think it's a big spoiler if you're fairly Cosmere-aware, but I'll put it under a tag just in case, regarding Nightblood.
In one interview a year or so ago, Sanderson said
I was skeptical about Sanderson at first, even after enjoying his WoT material, but learning that his books are mostly all connected in a cohesive literary universe and are part of a larger epic plot was what sold me. I'm a sucker for a unified author universe; it's what led to my owning all of...