To learn more about scalability, you can read how to design a scalable Plutus application and find out how to organize DApps on Cardano using order book patterns . Developers have also presented concurrent and deterministic approaches to the eUTXO smart contract architecture that might be regarded as a generalization of the parallel state machine steps introduced in the Hydra paper to realize multi-step state machines. A number of other developers and community members have also published papers, videos , articles , and useful threads on Twitter outlining their approaches.