I am not against thinking in terms of coupling and cohesion but I found the following different and interesting ways to think about separating software: https:

I am not against thinking in terms of coupling and cohesion but I found the following different and interesting ways to think about separating software: https://www.destroyallsoftware.com/talks/boundaries https://www.destroyallsoftware.com/talks/boundaries http://shaffner.us/cs/papers/tarpit.pdf http://shaffner.us/cs/papers/tarpit.pdf The common theme in both these viewpoints is that the biggest enemy is state, and who is responsible for it, rather than just responsibility on its own.