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.
First Quora user meeting for me by Nick Nicholas on Opɯdʒɯlɯklɑr In Exile
Feifei Wang is a Quora user too. And she has an astonishingly perceptive take on Quora product management here: