I like the article as I am also a command line junkie, but I have an issue with it. I might be being pedantic here, but the fundamental premise of the article is a falsehood.

UNIX is in no way, shape or form an IDE. IDE stands for Integrated Development Environment and means exactly that. All your tools under one roof.

I do not deny and in fact would also assert that the separate tool chain / everything is a stream of bytes philosophy can be used in amalgam as an incredibly powerful methodology for software development, but that doesn't make it an IDE.