That "extensible enough" is a good phrase to remember; part of the job is figuring our what parts of the problem are likely to change in the future, and what pa

That "extensible enough" is a good phrase to remember; part of the job is figuring our what parts of the problem are likely to change in the future, and what parts are likely to stay the same, and exposing them accordingly. This can depend highly on the problem space; as a game developer, I can consider "number of seconds in a day" to be a fixed value that will never change never. In other fields, that assumption could get your fired.