I have encountered the inverse: 1) People who exclusively use the command line, especially when recently graduated, have extreme difficulty thinking in an OO f

I have encountered the inverse: 1) People who exclusively use the command line, especially when recently graduated, have extreme difficulty thinking in an OO fashion, because they have not had the tools to support exploring inheritance and call stacks the way someone with a visual OO development environment has (Smalltalk is ideal for this.) 2) People who have used the command line exclusively are content without visualizations, which can be massively more effective at conveying information, especially about performance and architecture. 3) People who have used the command line exclusively are less likely to employ refactoring tools and more likely to tolerate long, poorly factored code because vim/emacs makes it easy to navigate and ignore the ugliness. 4) People who have used the command line exclusively, especially when they are recent graduates, believe that their approach is inherently better and necessary in order to be a good developer. They get curiously defensive if you expect them to be able to instantly jump to the definition of a method in question or actually use the Strategy pattern.