I’ve had good success with actor based models. When you say “protocol complexity”, I don’t understand what you mean. Observation requires good logging, but thi

I’ve had good success with actor based models. When you say “protocol complexity”, I don’t understand what you mean. Observation requires good logging, but this isn’t out of line for any complex system. Debugging (as in actual breakpoints in an IDE or post-mortem analysis) can be facilitated with stack tracking (this same problem occurs with async await patterns and is solved in a similar way). The advantages and disadvantages exist, but I think it’s an extremely effective programming model for many use cases. Formal state-machine programming, that’s the worst model, unless you need it.