It surprises me that something else hasn't come along as a more appropriate place for these AMA style sessions. Perhaps its the challenge of getting the audience, but theres many reasons why reddit really isn't ideal for these kinds of discussions. It works, sure - but the signal to noise ratio is really quite low and the politics of it mostly seem to just get in the way (see the Elon Musk AMA earlier this week where some of the highest voted questions were removed).