Nah, I dug deeper into this. Right conclusion, wrong reasoning. The reason KRaft turns out to be fine is because the KRaft topic does fsync! Source: https://cw

Nah, I dug deeper into this. Right conclusion, wrong reasoning. The reason KRaft turns out to be fine is because the KRaft topic does fsync! Source: https://cwiki.apache.org/confluence/display/KAFKA/KIP-595%3A+A+Raft+Protocol+for+the+Metadata+Quorum#KIP595:ARaftProtocolfortheMetadataQuorum-QuorumState https://cwiki.apache.org/confluence/display/KAFKA/KIP-595%3A... KRaft is used for metadata replication in the same way that Zookeeper is used for metadata. I.e., in a very meaningful way.