> What event system ? how does it capture the failure mode ? I have an app that is now 4 years old, on which 6 devs are working full time, what can I do today t

> What event system ? how does it capture the failure mode ? I have an app that is now 4 years old, on which 6 devs are working full time, what can I do today to make it better in a month or two ? Good question. Definitely the wording can be improved. Let me try to explain though. Suppose you write a simple function which processes payment. It fails. Now you can insert a state saying failed with error code 1001. Now this insert creates an event which invokes a serverless function specifically aimed at resolving this error. This way you have smaller cohesive functions which do "atomic" work as much as possible. PS: Co-author here.