Let’s face it, such comments usually cause more problems than do good. If someone changes the code and forgets to modify the comment, the reader might favor one or another at random. “Stop sign” example isn’t the best but you get my point.
Comments at best should explain some non-obvious logic, or some sort of reasons for implementing one way or another. For SDKs and packages overall, public APIs should also be commented. The rest imo should be readable from code.