[thesnide]

That. YAGNI >> DRY.

The DRY should be obvious when to refactor, not because of some compulsive behavior.

And then once you need more than 2 branches, please break the DRY that tend to stay forever.

[bunderbunder]

I really like the way functional programmers tend to think about factoring code. There's more of a tendency to think in terms of creating algebras. That forces you to think a lot more carefully about what abstractions you're producing, why, and how they relate to your domain model. And to be more cautious about it.

DRY, by comparison, is an almost offensively crude heuristic.