Many people have generators for shorter term emergencies. Even in places with severe infrastructure damage they often have grid power, just unreliably and only for a few hours at a time.

Also there's solar. For the cost of a gaming PC you can get a solar and lfp battery setup that will power a laptop for a very long time.

I understand, myself have such a backup battery for the house. But I am still pleading my case for a mobile solution. If there is a earthquake or large scale disaster, I am more inclined to have already my phone on me than my laptop.

( not sure what was the downvote for... )