Yes!!! I've been playing around with SingleFile and other similar software to try and hoard as much useful data as I can. And I've been mocking preppers for all these years.
An acquaintance of my second cousin has experimented with SingleFile CLI (https://github.com/gildas-lormeau/single-file-cli) and she reports it works great (it is rather heavyweight because it does invoke headless Chromium or even Firefox if you set it up right).
