yeah i was thinking about that, especially when khaodessey mentioned his costume.

its true that in shows and series "growing up" is rarely covered, the hero stays the same throughout the series, and if the series is brought to a logical end (naruto as hokage, anyone?) naruto would have to be grown up. no way a kage of any dort would look like he does now. maybe there will be a jump, or a new series. or the plot is somehow resolved with naruto still young. those are the choices as i see them.

also about the costume: what if someone becomes a chuunin? they'd wear the vest wouldn't they? how much of their get-up do you think would change?