> Every single Linux kernel currently operating within the borders of any of these states should turn itself off and refuse to boot

What exactly do you think Linux is? I would say that Linux would be forked in like 2 seconds, a bunch of different companies would start offering "attested Linux," and all you'd have to do was change your repos and update.

I would say that, but what would really happen is that we'd find out that Canonical, Red Hat, and a bunch of other distributions had been talking to the government for a year behind closed doors and they're already ready to roll out attested Linux. Debian would argue about it for six months, and then do the same thing. Hell, systemd will require age attestation as a dependency. Devuan and any other stubborn distribution would face 9000 federal lawsuits, while having domain names blocked, and the Chinese hardware necessary to run them seized at the ports with the receivers locked up on terrorism charges.

I have no idea where the confidence of the IT tech comes from. You (we) are something between a mechanic and a highly-skilled janitor.