He’d been saving up for nearly a year for the upgrade, and now that it was within his grasp, the anticipation had given way to unease. What if he couldn’t handle it? What if his system rejected it? These sorts of things happened; not often, but enough that there were releases to sign. The ‘Doctor’ said not to worry, that this sort of thing was routine, that they only brought up the risk because they were programmed to.
I’m sure he’s right. But the danger just seems more immediate when it’s you that might end up melted down for scrap.