[snide]

Text programs and design programs are already so different it's never a problem.

I'd equate it more to using your mouse for everything in photoshop or spending the time to learn that V selects the arrow key, and G selects the paint bucket.

Once you learn vim commands it's more a problem of using regular text fields (like the one I'm commenting in now). Right now I really want to use Vim key commands, and have to tell myself to Shift-left to get to the beginning of this line.