A few words on Ruby's type annotations state

Link: A few words on Ruby's type annotations state: "…that were written in a military training camp and accidentally grew to 5k words"

Linked is a deep article about type hints in Ruby. When I say deep, I mean it! Requires an in depth understanding to appreciate or follow. And it illustrates how incredibly tough it is to add a major new low level feature to Ruby or any other mature language.