Now queries can be parallelized, combining the results of several subqueries in different processes. This is a stepping stone to being able to run several subqueries on different machines. And if those different machines contain different shards of data, well, PostgreSQL has just evolved into a scale out &#x27;Big Data&#x27; database without throwing out any relational features. Two phase commit, synchronous replication, logical replication - all the pieces are falling into place, and you can see the remaining pieces forming in extensions like BDR and Citrus Data and others.