The main thrust of the article is that CLIs are expressive, and GUIs are not. I came up with a counter example QED.
He pushes this topic by talking about Unboundedness vs Boundedness and Internalization vs externalization. What he seems to fail to realize is that internalization and unboundness are not properties inherent to CLIs nor is externalization and Boundedness inherent to GUIs. Those properties are a function of how you designed your application and user interaction not the medium by which it is accomplished.
He pushes this topic by talking about Unboundedness vs Boundedness and Internalization vs externalization. What he seems to fail to realize is that internalization and unboundness are not properties inherent to CLIs nor is externalization and Boundedness inherent to GUIs. Those properties are a function of how you designed your application and user interaction not the medium by which it is accomplished.