Hm, I believe my wording is bit unclear. The trait system can really get complex as your widget layout gets more complex, and you want to write reusable components, But there's no clear way to understand what's the type it's expecting from the errors. You need to really understand the traits to implement any reusable components. Which is why I felt it's kind of unforgiving, if you're not fully knowledgeable of the primitives.

But I'm still learning it, so, probably missing some details.