https://www.postgresql.org/community/contributors/
Of that group, both 2nd Quadrant and CitusDB are represented...so in a way you could say their support is "by the vendor". Not to mention EnterpriseDB which also has support options.
> we can't use CitusDB when it is not supported by other vendors for use with their products.
CitusDB is no longer a fork, it's an extension...this means so long as your other vendors products support Postgres, they support CitusDB. More over, CitusDB itself will sell you an Enterprise package.
> The point still remains that after all these year PostgreSQL's scalability story is still a mess.
If by mess you mean specifically there is no knob and dial arrangement in the core of Postgres I would agree.
But within the core of PostgreSQL there are primitives which make scaling approachable (I myself am working on a data ingestion process that utilizes table partitioning and hand rolled sharding for PostgreSQL).
And there are now a plethora of extensions and tools provided by core contributors such as 2nd Quadrant and CitusDB to offer somewhat out of the box solutions and they even come with support.
PostgreSQL is not the right tool for every job and the replication/clustering area has been a a sore spot for Postgres in the past. But it certainly isn't bereft of options now...and the inclusion of logical replication in this beta is only the first step in bringing these options closer/into the core.
This is absolutely true. I don't get the irrational downvotes when it comes to postgres.
It's a great database but it is sorely behind with scalability features and is just now finally getting single-node parallelism and logical replication. It's still hampered by the requirement on 3rd party tools to get connection scaling, decent backups, HA and distributed clustering. The future looks interesting but the other databases aren't sitting around idly either.
That may not matter to you but it's a deal breaker for those of us in enterprises. We can't just be rolling our own versions of PostgreSQL and we can't use CitusDB when it is not supported by other vendors for use with their products.
The point still remains that after all these year PostgreSQL's scalability story is still a mess.