Consider that, in the Underground, the monsters have computers. And cell phones.
Consider further that their only source of highly processed silicon-type parts is the Waterfall garbage dump.
Consider who had to be repairing these items.
Also consider that typically once a modern phone or computer has experienced liquid damage, the internals are considered permanently wrecked and a board replacement is typically the only option.
“Where did we go? What did we do? I think we made something Entirely new And it wasn’t quite me And it wasn’t quite you I think it was someone Entirely new”