Ooh… Idle speculation! Love it!
Wild speculation:
*touch wood* Blogs.
Marginalised in the UX for a very long time; not aligned well to the Q&A aspect of Quora; too individualised, at a time when the site seems to be inching away from individuality; not subject to content moderation.
*touch wood*
The current trend though, is away from social media functionality, and has been deemphasising your followers. So:
Less Wild speculation:
In the display of your followers, or the mouseover display of a user: the followers you have in common.
It’s the last piece of the puzzle: MVW badges and TW quills have already been taken away from the former.
Really Wild Speculation:
Oh, this one’s nasty.
Survey Questions.