Long before portable computers, the Beatles anticipated this problem of moving from the "A" side to the "B" side. They released a 45 rpm vinyl record in 1965 with "I'm Down" on one side and "Help" on the flip side!
I marvel at the ability of engineers to manage computer problems at great distances in hostile environments. I have enough trouble managing mine right in front of me when I have full physical access and the ability to substitute parts. One obvious trait that the NASA ground team has perfected is the ability to plan ahead, think about possible consequences, and craft a careful action plan. Many personal computer repairs go down some dead ends and depend upon physical access to reverse errors and restore functionality.