alt Hacker NewsPostgreSQL actually supports sharding out of the box, it's just a matter of setting up the right table partitioning and using Foreign Data Wrapper (FDW) to forward queries to remote databases. I'm not sure what the post is referencing when they say that sharding requires leaving Postgres altogether.
This is specifically what they said about sharding
> The primary rationale is that sharding existing application workloads would be highly complex and time-consuming, requiring changes to hundreds of application endpoints and potentially taking months or even years