[lykahb]

I think that in the event of a such a collapse, there would be two new directions: turning the surviving advanced digital devices into general computers, and building new electronics. Reusing existing common software would be easier than building something from scratch. So, I'd expect that postmarketOS and flavours of Linux for low-power machines meets most needs.

Also, it'd be fantastic if iPhones have a doomsday switch that untethers them from Apple - that'd be the difference between a useless brick and a precious artifact of a bygone era. The post-apocalyptic setting has potential for a game that comes from the perspective of a builder, and goes deeply into civil engineering and IT - build architecture that can withstand the elements, design a water chip, write embedded software for it.