Ask HN: Corporate innovation, but...

Imagine a company with maybe about 200 programmers, some of them doing web development (UI stuff), some C++ image stuff, some SQL stuff, etc. As they've started to adopt a technology there develop splinter groups of how to go about coding things. Say one uses a class hierarchy to get things done, another group uses a more functional approach, and a third uses some highly optimized (by that I mean less reusable, but fast) version. Obviously, there are a number of ways to code something in the wild. And I truly enjoy discussing the merits of any approach, but during the discussions on these approaches it occurs to me that people want to apply this reasoning: "who cares if it could be better, we just need to be the same". Thoughts? (I know it's kind of generalized, but I feel that this is actually common).