It's a real challenge for Quora. Introducing some kind of automated ranking system seems like a natural way forward, but Unless Quora’s really careful, on most of these systems, longer-term users generally are “higher quality”: they have more posts, more upvotes, more followers, more experience knowing how to do well on the quality metrics, etc. So Quora’s current techie male base starts with a huge advantage, which will make it hard for them to expand into other areas. On the other hand if you don’t give the current base an advantage, they’ll be justifiably bummed. A tricky situation.