Unbind the framework from Test::Unit and Prototype
Nathan Youngman commented
It's truly the best of both worlds, easy to get started, but without feeling stuck later on. Giving these choices, and out of the box Unobtrusive JavaSript, cause me appreciate the direction of Rails the same way as REST did back in 2006. Thx!
Thanks @dhh for sharing your thoughts.
Rails will always ship with opinions for the default frameworks, but using jquery and BDD or any other combo should be easy as pie to plug in. Def a big goal for Rails 3.0!