Could esteemed commenters please read the words the Go language team actually wrote?

    > Or, we could decide that parameterized methods do not, in fact, implement
      interfaces, but then it's much less clear why we need methods at all. If
      we disregard interfaces, any parameterized method can be implemented as a
      parameterized function.
    
    > So while parameterized methods seem clearly useful at first glance, we
      would have to decide what they mean and how to implement that.

Well, they have finally decided what parameterized methods actually mean, and they see how to implement that, and it all seems clearly useful. So...