unfortunately, i was not available while the interview with Aditya was happening, and i would like to comment on one point that he made:
"I think that there are a very few journal who will accept packages written with the breqn package, for example"
is there a comment mechanism that will allow me to add my two cents after the fact? there's nothing obvious in the (current) link from the interview intro page.
(by the way, this one, like all interviews so far, is interesting and well worth reading.)