If I understand this correctly, it's similar in design to AWS Aurora or GCP AlloyDB.The underlying storage provides the distributed primitives and the DB itself

If I understand this correctly, it's similar in design to AWS Aurora or GCP AlloyDB.The underlying storage provides the distributed primitives and the DB itself just reads and writes to it. Like Aurora, some tweaks to the engine were required, but the core query engine is largely intact. Has anyone seen postgresql on FoundationDB? Is there anything unique about SQLite that makes it better suited for this approach? One thing that comes to mind is how they were able to do block level locking instead of full db locking. That took some tweaking but probably significantly less than postgresql might require.