Possibly! You're right that path dependence played a role in safety issues: the problems we found in 3.4.0-rc3 were related to grafting the new v1 replication p

Possibly! You're right that path dependence played a role in safety issues: the problems we found in 3.4.0-rc3 were related to grafting the new v1 replication protocol onto a system which made assumptions about how v0 behaved. That said, I don't want to discount that MongoDB has made significant improvements over the years. Single-document linearizability was a long time in the works, and that's nothing to sneeze at! http://jepsen.io/analyses/mongodb-3-4-0-rc3 http://jepsen.io/analyses/mongodb-3-4-0-rc3