It's pretty but not really ruggedized. It's not designed for water/moisture, dust or other environmental resistance, extended temperature range, impact or vibration resistance (I doubt it would survive as checked-in luggage on a flight, for example), longevity, etc. All you get is whatever protection that the Pelican case gives you. It's better than nothing but a prepper would probably be better off with an intentionally ruggedized computer.

I think portability is the #1 factor. It is sort of a Rpi laptop, with the primary benefit being that it is highly customizable for an intended use case.

The reality is that any scenario that has people relying on this type of thing as a "device of last resort" would also most likely obliterate this thing itself. We are talking about a pretty extreme situation, ruggedized laptops would be more practical. And even if the rugged laptop was $10,000, that's a small price to pay for saving the world.