I audited the source for the two projects I built today with Codex in Xcode and it's hard to find anything I could classify as 'slop'. It perhaps speaks to how well Cocoa development is structured, how consistent everything is, but it all just looks… normal. I would have no problem whatsoever building upon and maintaining by hand what I've got here — there are no weird hacks, nothing that makes me scratch my head, nothing I wouldn't have done myself. The horror stories may just be horror stories