There is no type hierarchy and there are no subtypes. Interfaces do not describe type relationships. The conversion required between `[]int` and `[]interface{

There is no type hierarchy and there are no subtypes. Interfaces do not describe type relationships. The conversion required between `[]int` and `[]interface{}` further demonstrates the significance of this distinction. As for losing type safety when writing generic containers, this is true, and another reason why people don't do this.