The vast majority of humanity has always run on duct tape and bubblegum. :) There are still computer systems designed with high reliability and accuracy. See f

The vast majority of humanity has always run on duct tape and bubblegum. :) There are still computer systems designed with high reliability and accuracy. See flight control systems. New technology typically doesn't work on duct tape and bubblegum. So it has to be good. Current technology is going to be just right enough to work.