It does. The distinction I'm making is that fsync is only 100% safe if you use it with a shared-nothing replica and min-replicas-to-write >= 2. If you have such

It does. The distinction I'm making is that fsync is only 100% safe if you use it with a shared-nothing replica and min-replicas-to-write >= 2. If you have such a replica, you no longer need the fsync, and you are safe against anything but a regional-scale catastrophe.