[donavanm]

A lot of this can be from (un)intentionally trying to maintain separation of responsibilities between different teams or developers. Decoupling, interfaces, etc all add up and pretty soon you start building based on what's already done vs where you originally intended to go. And I don't think that's a poor choice; nine women can't have a baby in one month, but they can have nine in nine months (to butcher an old saying).