Yes, unless you are doing a clean room implementation of paxos or the raft protocol it probably isn’t worth the effort to create harnesses to simulate packet lo

Yes, unless you are doing a clean room implementation of paxos or the raft protocol it probably isn’t worth the effort to create harnesses to simulate packet loss, thundering herds, split brain, out of order responses, etc. Even then, if you are writing some distributed synchronization primitives you might be better off with formal proofs than some sort of test harness.