Behind all the arguments for the superiority of threaded BBs there is a fundamentally flawed assumption. The assumption is this: That bicycle manufacturers are in the business of manufacturing technically superior, relatively low-maintenance bicycles.

The fact is this: Bicycle manufacturers COULD manufacture technically superior, relatively low-maintenance bicycles, but that's not their purpose. Their primary purpose is to return profits to their investors. In that regard, their purpose is optimized only when they (1) sell you a bicycle at the highest possible price, and (2) manufacture that bicycle at the lowest possible cost. Threaded BBs and framesets cost more to manufacture than BB30 BBs and framesets. For that reason, in the eyes of the bicycle manufacturers, BB30 is the superior solution -- it fits with the lowest-possible-cost ethos.

Ultimately, that's the only factor that matters to the manufacturers. And shareholders wouldn't have it any other way.