If you are an owner of a company ... I don't think you would consider "vi" for your software development IDE. Because it wastes time and money.
Well, this is not really correct. I own three companies, and each of the developers I pay may consider and use vi / vim, emacs, and similar applications.
In real world situations, the editing capabilities especially of vim and emacs surpass Visual Studio and Dreamweaver by multitudes, especially if your are working on web application development, and - like I do - work in areas where development is heavily driven by specifications.
vim and emacs really show some shiny abilities when it comes to working of templates, snippets, and all the like.
I have been allowing Dreamweaver and Visual Studio in my companies, but we dumped those ~ 2005 after two projects where we relied on vim and co, and discovered that the workflow and time consumed was less.