[bendiksolheim]

If by "only used" you really mean you never ever use anything else I don’t believe you are missing anything. Other than bragging rights of using Vim, of course /s

But if you occasionally use other editors, many of them have plugins or modes enabling Vim keybindings. In my daily work I switch between Emacs, IntelliJ, Vim and XCode, and all of them have varying degrees of Vim emulation, which makes switching a lot easier.