I feel like it's more for vim users who need a gentle introduction to emacs (me) and really don't want to leave modal editing and more advanced vi features behind. It goes a lot further in emulating the day-to-day vi experience than literally anything I've ever tried before. But it's also a pretty nicely managed set of extra packages that are all smacked around to play nicely with each other.

If you've been using emacs for 20 years and already know how to do stuff and maybe even write your own modes, then it's proooobably not for you. (I mean, you coulda been using evil a long time ago).