Now I am not a hardcore Vim fan. In fact I tend to use whatever editor I can get my hands on at the moment (which tends to be vim as vi or emacs). But this review, Linux.com | First look at Vim 7 makes me definitely think that sometimes it's going to be something that I really really want to have installed.
Imagine, you are editing a configuration file on your server and restarting services when all of a sudden you realize that you have put in the wrong options for the past two minutes. With this you can go :earlier 2m and get back to where you were. . . .