Part of it is that those who are top of the top have already done it, they don't hang around to keep doing it once they have it. So that removes the top chunk. Though the top chunk actually remove themselves with static. So static, and then the top of the random, both removed and done. So what's left are the good but slower people who didn't finish yet, and the rest. Eventually it'll be down to just those who need carrying, and a few bright stars to do that work.