>>280352867
He (almost) always has answers for stuff any time people ask him lore questions in Q&As or at panels or events. Sometimes he'll even just say stuff during his streams or post relevant lore trivia on twitter while the anime episodes are airing. The world of the abyss is fleshed out to a greater extent than any of us can probably imagine. But the majority of information that is inconsequential to the context of the main story is all in Tsukushis head.