It already almost goes without saying that there's no utility to learning it, not in proportion anyway to the amount of time and thought it would demand. Nobody writes things by hand; and those who do are not quite so constrained by material lack as the scribes of earlier eras. Saving space and time in a notebook on the go is nice, but again: not enough to push anybody into actually learning the whole thing.
The only real appeal is aesthetic; it is, in my experience, a beautiful system, beautiful to use, beautiful to read, beautiful to contemplate.