@Nobi Yeah, not really an infodump, we knew all this stuff already. It's just weird that the dad knows it all, and he doesn't give a reason why
he knows, but that's kind of the point?
@MCX01 What do you mean, "now"? The "old world plot twist" was never a twist, it's a core part of the setting. The cataclysm destroying most of the old world is already something that we've known from pretty much the beginning, and we've known that it's from the vast majority of the Earth being set on fire and not at all from nukes, and we've more recently come to know that the fire powers and the infernals/fire people/demons/whatever and most likely the cataclysm itself have something to do with this crazy hell dimension and the Evangelist. The reveal that space ships used to exist doesn't somehow hint at anything being different than what we already knew. There used to be a whole bunch of animals too, before they all got set on fire along with everything else.
The only new information we learned this chapter is that Arthur's parents are kind of dicks, but I guess it's okay because his dad is just as insane as he is if not more so.