I don’t know that they’re more important than everything going on in the middle, but I guess they are interesting in that the trailing edge suggests, to the extent you view development as a goal and being more developed as valuable, the place in need of work, and the leading edge as the greatest extent you should expect out of yourself (for now) and might suggest things you might work on (within a particular developmental model) given where your leading edge is.
I don’t know that they’re more important than everything going on in the middle, but I guess they are interesting in that the trailing edge suggests, to the extent you view development as a goal and being more developed as valuable, the place in need of work, and the leading edge as the greatest extent you should expect out of yourself (for now) and might suggest things you might work on (within a particular developmental model) given where your leading edge is.