[BillinghamJ]

There are a lot of non-trivial aspects to scaling event sourcing systems. Particularly if you want atomicity or asynchronous two-phase committing. Having implemented them ~5 different ways for different services at my startup, I’d definitely welcome a reliable DB-level abstraction.

[daxfohl]

Also putting that abstraction in the app layer allows developers to break it. Either by accident, or as a temporary hack that never gets fixed, or a temporary hack that has unforeseen side effects.

[Fire-Dragon-DoL]

Sorry for my inexperience in this kind of implementation but wouldn't an sql transaction achieve something similar? And with table partitioning (at least on postgres) you should be able to go quite far, instead of neediness a new db (and a lot of related stuff to study)

[BillinghamJ]

No because in a distributed system, you can't rely on SQL transactions. i.e. if you need to make one API request to start the transaction and a second API request to commit it/rollback - you can't hold the SQL transaction open between those.