Surface modeling caveat

Source:
Brad Redmond, Director of Industrial Design Marketing, think3, Inc.

Surface modeling gives you the freedom to design as you please. You can create complex shapes with a simple click and drag, and you can tweak the shapes until you end up with what you want. The drawback is that many surface-only modeling applications don 't record the history of how you achieved the design. Therefore, simple changes such as increasing the radius of a fillet or the diameter of a hole can be arduous and time consuming. You must re-create everything from the point of change forward.