&gt; but IMHO the central point is a different one: CP systems have performance limits so many real world systems don&#x27;t even try to be CP<p>They try on paper, so to speak.  They might have a CP component, but it is not in the datapath -- it is there for maybe cluster configuration,  or say to elect a leader. And then they can claim they have CP because everything goes through the leader, and the leader was elected by a CP component.  However without realizing they just pushed all the error cases into corners -- when the membership changes (nodes die, die in unpredictable ways, become partitioned, new nodes added...). They never test that extensively, which is a hard thing to do, because there are so many cases and combinations.<p>The bottom line is even if they have a Paxos or Raft component in their system doesn&#x27;t mean their data is stored consistently.