I get my hopes up when I see another vim emulation project, but after using it for just a few minutes, I already found a few missing vim features I use every day:

* Toggling if search results should be highlighted (:set hls, :set nohls)

* Opening the filename under the cursor in a new window (^W f)

Completely emulating an entirely different editor is very, very difficult :-(

I applaud everyone contributing to these projects, and hope they continue to improve! They've already come a very long way from evil, and viper-mode.