You're likely not familiar with TEMPEST/EMSEC but this stuff was known about and discussed when designing air gaps going back to the 60s..

https://www.nsa.gov/portals/75/documents/news-features/decla...

the x-risk/LessWrong crowd aren't adding anything to the conversation that seriously people haven't already considered.

I didn't mean they first invented or described the methods, but that they've been consistently presenting a solid argument that these and other methods make airgapping and sandboxing AGI a dangerously flawed idea from the start. They are the serious people who considered this, and to date nobody listens.