Yep, the tutorials/guides are really good, but as you say, the details aren't really covered. There are so many examples like "relationsToArray(): Get the model's relationships in array form."[1] Just an expanded version of the method name with no context or detail.
The good ol' "you thought docs, but actually generated no information gain and no docs, ha tricked you! but look at how fancy our docs website looks" kind of documentation style.