Yes, I fail to see what Quora is other than a cliquey silicon valley Stack Overflow Q&A site which actively doesn't want more users because it acts protective over content, demands signups and generally acts in a stupid manner rather than just giving me what I want. I don't see a single thing it does better than Stack Overflow, and Stack Overflow is public without the sign-in stuff. Of the 30-40 times I've hit Quora from web searches it's had useful information for me only once. What a load of hype. It certainly seems to stroke some important egos though, so they can play with it for as long as they like while the rest of the world moves on.
Edit: grammar/typos