Originally Posted by slowrevs

It strikes me that as bike technology keeps improving, manufacturing techniques would follow.

Press fitting a completely sealed preadjusted BB into a frame eliminates the need for adjusting chain wheel position via BB during manufacturing and is much faster than threading. Plus, a tight fit reduces any chances of water penetration into that part of the frame. It may also be a way for mfrs. to limit cyclist/shop/rider options for changing things around and messing with engineered design stress points, etc.

Just a thought.