None of that has anything to do with what you said in the post I replied to. "Add an extra octet to v4 addresses" has hard technical barriers to deal with if you want it to work, regardless of what the world looks like or what you're designing for.

> We now know that the "internet of things" and "having your fridge online", as well as "5G in everything so people can't firewall it off" is just insane and malign

None of this is really relevant either. IP's job is to handle the addressing used when sending data over the Internet, and it should do this job well regardless of what people end up doing with it.

> We also know that tying an IP address to a person (compared to an ISP using NAT) reduces privacy

We don't tie IP addresses to people. PI allocations might sort of count, but regular users don't get those.