I was regarding smaller revisions. Think 3G>3GS
And? You said a 'radical redesign can throw off your audience'. Apple made a radical redesign and it didn't 'throw off' customers. Doesn't matter that they didn't make a radical redesign before...they made it, and it was successful. So it's not out of the question that there could be another redesign and it's silly to say it could 'throw off the audience'. Keeping it the same certainly could turn people away as well. I don't want anything to do with the 4, and if the '5' remains largely the same, I'll be passing on it.