>(I recognize that HN is generally hostile to considering how secure attestation might end up widely adopted and demanded by games and other applications, but the ship has already sailed. I’m just trying to yell “iceberg” and get the Linux community to face what’s happening and form a useful strategy in response.)

While I appreciate your thoughtful comment, I don't see you offering much in the way of strategy beyond accept the loss of control over your own machine in the one OS that does not inherently hand itself over to third parties.