[nickpsecurity]

That won't work given his primary threat model: government censorship. Actually, I had to point this out to Bruce Schneier back when he was calling for tech to take back the Internet. I dropped a dump of all kinds of it from CompSci. I also told him it wouldn't work. Civil liberty and privacy from government is inherently a political problem because the government can always outlaw this, jail someone for that, or sometimes even murder its opponents. Problem is government itself. Only people can do something about that.

I agree with the need for what you suggested, though. It's also within reach of current technology with legacy compatibility for the most part. CHERI team has demonstrated that nicely with a FreeBSD port to a capability architecture that also supports safe, C apps. See main paper and "Beyond PDP-11" for details.

https://www.cl.cam.ac.uk/research/security/ctsrd/cheri/