The author critiques having sequential code executing on individual nodes, uninformed by the larger distributed algorithm in which they play a part.

However, I think there are great advantages to that style. It’s easier to analyze and test the sequential code for correctness. Then it writes a Kafka message or makes an HTTP call and doesn’t need to be concerned with whatever is handling the next step in the process.

Then assembling the sequential components once they are all working individually is a much simpler task.