I used to use nano, and for me it was the fact that every one else seemed to love vim, so I felt like I should at least try it out. Honestly, it takes about 20 minutes, max, to get to the level of being able to do what nano can do in vim. And if you want something more, it's not very hard to learn after you get the vim basics. I'm not going to say it's for everyone (especially if you're already used to a full IDE) but I would encourage anyone who's at least a little interested in trying it out for a day.