> That every language has a Raft implementation with bugs? Yes that's probably accurate because lots of people make Raft implementations for fun and learning. Again, Go does not have a single Raft/Paxos implementation that is rock solid. I have seen many in C++, Java, and Rust that are doing tens of millions of requests per second in production for over a decade.

No, they are citing that every Raft implementation that Antithesis has tested has bugs. The etcd implementation you note in go that has bugs also does tens of millions of QPS and is over a decade old. How are you confident that the proprietary implementations that presumably haven't been fully tested don't have subtle bugs that don't show up in practice?