Reminds me of the Tom Scott video on the cable singe that leverages the moiré effect:

https://www.youtube.com/watch?v=d99_h30swtM

I worked for an L1 blockchain for a couple years and while the term "decentralized" is bandied about a bit too much, reading articles like this does underscore how vulnerable global traffic is.

e.g. some EVM chains have a majority of "stake" in either one country or several adjacent countries (particularly in Asia). A cable cut there, which the article points out has happened, can lead to the blockchain getting cut off or even halting.