I don't think a TEOTWAWKI scenario is likely but I do prepare for interruption in services/deliveries.
In this age of political unrest not to mention the ever present possibility of natural disasters via weather control I think it is prudent to be ready to ride out a storm, regardless of what form it takes.
I have been watching an interesting BBC series that is now on youtube called "The Wartime Farm"
It is an eight part series on what life on a British farm was like during WW2 and the hardships they faced and how they "made do". We may soon face a similar situation.
The same team has done series on the Tudor period, Victorian, and Edwardian periods also. If you can ignore their gross ignorance on Catholic theology, the one on the Tudor farm is fascinating from the perspective of how things were done pre-technology.
When you think about it we really live in an anomalous period of time. Never before have "consumers" had items available on demand, all previous generations had to be prepared, whether that was preparing for winter, for famine, for war, for sickness, or shortages of one sort or another.