> Amazon has explained in their reinvent videos that Aurora is the storage layer of Postgres rewritten to be tightly coupled to their AWS infrastructure. So it

> Amazon has explained in their reinvent videos that Aurora is the storage layer of Postgres rewritten to be tightly coupled to their AWS infrastructure. So it is just regular Postgres (they upgrade to latest on a slightly slower cadence). And there’s no benefit to getting the Aurora layer upstream, no one else could use it anyway. I don't think this is an accurate analysis. For one, they had to make a lot of independent improvements to not have performance regress horribly after their changes, and a lot of those could be upstreamed. Similarly, they could help with the effort to make table storage pluggable, but they've not, instead opting to just patch out things. > Citus is an extension, not a fork. Used to be a fork though. > Both are actually pretty heavily aligned with the continued success and maintenance of mainline open source Postgres. How is Amazon meaningfully involved in the maintenance of open source postgres?