[shkkmo]

You seem to be assuming "there is a world war" means "everywhere is a full scale conflict zone", which it doesn't. In reality, the severity of fighting will vary significantly. Some areas may face challenges with food / water, other areas won't. While the power grid may not be reliable in some places, generators, solar power and local power generation will mean that most people will have some level of access to power.

One of the points the article is making is that stuff like "off-grid power generation, packet radio infrastructure build outs, hardened underground storage containers for computing resources, etc" will be important in areas with active fighing / bombardment, many other areas may face entirely different types of challenges.

Do we have a process for quickly revoking CA certs owned by enemy countries? Do we have locally hosted mirrors for important content / services / tools that are hosted across undersea cables? The internet has been more and more integrated into our work lives and it does bear some thought to make those systems more resilient so the economy can maintain some level of functionality in a world war.