Controllers are a complex topic, but as the linked talk describes, it all comes down to some basic control theory concepts. I wrote about them in my Desired sta

Controllers are a complex topic, but as the linked talk describes, it all comes down to some basic control theory concepts. I wrote about them in my Desired state systems post https://branislavjenco.github.io/desired-state-systems/ https://branislavjenco.github.io/desired-state-systems/ if somebody wants a high-level overview of how to think about them. Basically, declarative state implies value semantics which makes it easier to reason about. Underlying complexity is high though, and you need to judge how necessary it is.