On the contrary I think whenever you get into a situation where there is an overlap in functionality, that means it needs to be further broken down into more sm

On the contrary I think whenever you get into a situation where there is an overlap in functionality, that means it needs to be further broken down into more smaller independent units. I see tremendous value in adhering to this philosophy, and usefulness of Unix is a testament to it. That does not means there are no shortcoming in the overall Unix approach but as far as this particular philosophy is concerned, I think it is very smart strategy to adhere to. Look at nature, our different body parts are specialized for specific functions(for example eyes, ears etc) and they do those functions remarkably well and when you combine these, we can recognizing the physical world.