Why? Because knowledge workers are extremely efficient. They don't want to have the tools spread out everywhere and have to look into all those tools one by one. Furthermore, we could already ask each other questions on Twitter. Tweeps would just mark these tweets with a hashtag like #question, #justasking or #durftevragen. (The last hashtag is an extremely popular hashtag in Holland. Translated it means 'dare to ask', helping tweeps to ask questions more openly instead of keeping them for themselves.) You can even filter tweets with a question mark.
I guess Quora does a great job underlining the power of asking questions. As soon as we deeply 're-understand' this, we'll continue to ask questions elsewhere. And so for now I'll continue to use Quora happily!
Do you agree with my view on the future of Quora? If not/so, please leave a comment.