Reticulum is in its infancy and does what you describe (and can use any communication medium), but that kind of separate intranet system is difficult to search the way the Internet is. It would be like Discord where the inability to search it (unless you have already joined the relevant Discord) makes it hated as a replacement for forums.

In case anyone hasn’t seen it, this is the video of Pretti’s execution side-by-side with Kristi Noem’s description of it. https://www.youtube.com/watch?v=6QF-zWPbuLI

There are lots of people who said that China’s semiconductor industry would collapse. (Many still do think China itself will collapse, which is possible, but not very likely as they think it is.)

I’m not sure why this is surprising or even notable, they’ve been using this 7 nm process since last year.