Code signing and gatekeeper on the Mac is fairly recent, but iOS has had it since the beginning. Maybe they were planning for this end-game all along since they

Code signing and gatekeeper on the Mac is fairly recent, but iOS has had it since the beginning. Maybe they were planning for this end-game all along since they started iPhone development, likely around 2005 or so (at least a couple of years before the 2007 launch)? I could totally see them assuming they would need to embed bash in iOS and not wanting to use GPLv3, and the rest of the os variants follow.