As a beginner, I think it's largely a matter of documentation.
In Go, you can very easily see all the methods that a type implements. However, you don't see which interfaces it implements because it's implicit.
In Rust, the methods are often hidden away in trait implementations, so it's harder to see what you can actually do.
It seems like this might be fixed if the doc tool generated an index to all the methods, as a reference? Or maybe there already is an easier way that I overlooked.