Object orientation and its specific forms are, of course, not the only influence we have, and not the only one we should have. Many different ways of developing software have been found to be useful and have value in the world of software development. Depending on the kind of system we want to build, it is not always the best even to model as objects.

There are very common ways that lend themselves nicely to specific problems, be it a more functional approach when faced with the problems of concurrency, or a more logical approach when trying to build a rule engine. All these kind of ways to approach a problem influence the way we think about a system, and the more different approaches there are in our toolbox, the better we can pick one that fits.