A2A by Steven de Guzman (or, as I like to think of him, Lazarus, only Lazarus was only brought back to life once).
I don’t have much to add. I mean, I likely do, but Scott Welch (the Scourge of the Mensa Members of Mountain View) would put it much more insightfully than me.
Feifei Wang is a Quora user too. And she has an astonishingly perceptive take on Quora product management here: