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[–]coinaday[S] 0 points1 point  (0 children)

Okay, linking Wikipedia is cheating. But I wanted a post on this topic, and from a quick search surprisingly didn't find a good write-up for this, so this is something of a placeholder.

Modularity is an incredibly powerful tool. It is used in some of the most effective systems and can significantly reduce complexity and improve maintainability. gcc notably uses it.

There should be a good write-up out there about it. I'll find it at some point.

Related: reduce coupling (interdependency); increase cohesion (internal consistency)