It doesn't take anywhere nearly a year to get that comfortable with emacs. I say this as someone who made the switch a couple of years ago - I was tolerably productive in a couple of days and pretty much at home in a week or so.

I made the switch because I wanted to be able to use SLIME, but it turns out that I'm not actually using Lisps that much day-to-day at the moment. I'm equally at home in both Vim and emacs now, it's not like you instantly forget how to ride that particular bike.