They were dependent, in many ways, on digital technology. They could not long survive without robots to do work for them and computerized control systems to keep the installation running. They had no ability to fabricate new computer chips to replace the old. But the Arkitects, anticipating this, had stocked them with a large surplus of spare parts that would last for hundreds of years if husbanded carefully. And they had plans for rebooting digital civilization later; they had tools for making tools for making tools, and instructions on how to use them when the time came.