Be sure to have backups and not that sole location. Same is true of any physical drive, but at least a drive failure might be recoverable. A cloud storage can just be gone one day.
Rhaedas
Their work resulted in the often-posted newspaper article speculating how in a few centuries the emissions of burning coal might become a problem for the world's environment. What they didn't anticipate was the rate of increase from a population explosion which would begin its climb in a few decades from various factors.
That's rather symbolic of the state of things today.
Or full VR experience online eg. Neuromancer. Though even if the tech was available and fully tested and working, there are many pros and cons to all forms of enhancement or out-of-body existence, or a more extended life.
Clothing maybe. Jewelry or other inorganics.
losing my Capri-Sun
The world may never know.
So, lack of communication. That does seem to be a core part of problems in any place.
Alternate history is messy. Look at all the speculative stories of how time travelers going back to get Hitler end up making a worse future for various reasons. Hitler is likely to have protection by the time police from time traveling "heroes" because so many think this is an easy fix.
No time travel goes unpunished.
Nothing that high level. Different systems are running independently, some may be redundant to each other in case one fails. But run something long enough especially in extreme conditions and things can drift from the baselines. If a power off and on regularly prevents that it's a lot easier than trying to chase down gremlins that could be different each time they pop up for different reasons.
Even NASA I believe has done such resets from Apollo through the unmanned probes from time to time. Mentioning Windows, the newest versions don't really do this baseline reset if you just shut them down, even if you disable the hibernate/sleep modes, while a restart does.
Sprinkle a few drops of water in hot oil, or even just on a oven burner. See how it pops? Now imagine a lot more suddenly going from ice to vapor. It's explosive, and some hot oil is going to be thrown out on anyone in range.