An excellent article with excellent examples as to why us crusty old Unix guys still use vim, and why it still rocks.

The point is, with vi, your keyboard becomes a huge specialized text-editing gamepad with almost a hundred buttons. Each of them has at least two functions, shifted and unshifted, so you have almost two hundred functions at a single keypress (not counting Shift). Commands are incredibly powerful for text editing, and you can even combine them to obtain the best results. While typing some text, it is a regular keyboard, but when you’re back to normal mode you have the best-designed text-editing machine there is, and it shows.