You can build method access in Ruby trivially enough but you will forever be explaining to users which node.class isn't node[:class]. And now every method adde

You can build method access in Ruby trivially enough but you will forever be explaining to users which node.class isn't node[:class]. And now every method added to that Hash/Dict-like object is a breaking change because someone somewhere could have used that already to access a key. The { a,b | } syntax is also still ambiguous with hash literals, unless you require that | to be there, and that looks like it gives the parser a whole lot of look-ahead work to do in order to distinguish hashes from lambdas.