I forgot to mention: differential dataflow is capable of providing much stronger consistency guarantees than Noria is. Differential dataflow is consistency preserving—if your source of truth provides strict serializability, differential can also provide strict serializability—while Noria provides only eventual consistency.

Tapping into the consistency-preserving features in Materialize is a bit complicated at the moment, but we're actively working on improving the integration of our consistency infrastructure for MySQL and PostgreSQL upstreams.