Reactive and evented models are much harder to reason about and design properly. When you're just doing things sequentially in a fabric script it is much easier

Reactive and evented models are much harder to reason about and design properly. When you're just doing things sequentially in a fabric script it is much easier to make sense of what is going on. As soon as you make things reactive and evented to support dynamic cloud topologies you are basically on another planet and none of the old rules apply. This is why it is hard to design "cloud native" systems. I don't think it is the lack of interfaces and standards but the model being inherently non-sequential. In many cases it is also non-transactional and barely eventually consistent.