Yes you need to enable sharding but its provided for you, if you want to enable it is what I meant. And adding shards as well. All configuration options in Mong

Yes you need to enable sharding but its provided for you, if you want to enable it is what I meant. And adding shards as well. All configuration options in Mongo - vs you need to do this in a more manual way in Postgres (and change your app code more) Of course it haa a perf impact - nothing is free.