Event-driven programming frameworks are typically used to provide multi-tasking capabilities in languages or environments that lack an explicit threading model, such as Node.js.

Obviously, event-driven computing services like AWS Lambda, Google Cloud Functions, and Microsoft Azure Functions are not suitable for mission-critical, always-on tasks.

It’s hard to see how distributed IoT-based microservices, such as the Iota distributed hyperledger blockchain, can be hardened without this sort of safe event-driven programming language.