Or to look at that from another angle, if you were to define a Trait which has generic methods that Trait won't be "dyn-compatible" meaning that you can't do dynamic dispatch with this trait, which may be irrelevant to you (if you don't want dynamic dispatch anyway) or a showstopper (if you needed it, now your project won't compile).

Is it because of the kinda built-in duck typing, for want of a better word? The thing where if you have a method (or methods) that matches the signature of method(s) of an interface, you implement the interface without explicitly declaring so?