[...] with some apps, you just know that they are well written. Those apps speak their quality loudly. They are coherent, they have integrity, their UIs make perfect sense, they behave as you expect, and so on.
Why is this a good sign of the code being clean? Because software can’t be planned. Software is always a dialogue with its users, with competing software, and with its programmers. Good software adapts, and for adaptations to take place gracefully, the code must be susceptible to changes. Bad code isn’t.
