IMO, the first 3 points are the key. And change notifications addresses the first one directly, and will enable more effective horizontal scaling of Meteor server (which will indirectly help with the second point). Together with the retryable writes expected benefits and the better array handling targeted for Mongo 3.6, that will mean that Mongodb will be better suited for more use cases than currently, also helping with the third point. Address the first point with notifications API and provided Mongodb delivers as expected, that will take Meteor/Mongo apps well into the twenties…