I've always said that interfaces assume a particular volume of activity. Too many or too few and a different interface is appropriate.
I was looking at StackOverflow users vs. ui.stackexchange.com. Quarter of a million users, and a ridiculous quantity of questions. Look at Jon Skeet's profile. He has 2659 badges and it just looks silly. His most popular question has 415 answers.
What is the sweet spot of volume for this interface? What breaks down at high scale? Can StackOverflow 10X their volume and maintain the same interface? 100X?