depending on the size and needs of distributed system or application im kind of really excited about postgres + pg_lake. postgres has blown my mind at how well it does concurrent writes at least for the types of things i build/support for my org, the pg_lake extension then adds the ability to.. honestly work like a datalake style analytics engine. it intuitively switches whether or not the transaction goes down the normal query path or it uses duckdb which brings giga-aggregation type queries to massive datasets.

someone should smush sqlite+duckdb together and do that kind of switching depending on query type