One of the most anticipated successful of all renderings is an internal frames. As with any established rendering formulas, it contains real risks of overuse, and has the making of a cliche', but these dangers are the only evidence of the fact that it does work. It simply needs a little more care and imagination when it is being applied.
The appeal of frames within frames is partly to do compositions, but a deeper level it relates to perception. Frames within the render have the effect of puling the viewer through; in other words, they are a kind of window.
On a purely graphics level, frames focus the attention of the viewer because they establish a diminishing direction from the outer render.