I have a question. When modeling a surface connection (curvature to face), what is the advantage of using a boundary surface instead of a loft to connect the sides of an open surface? From the feature statistics, the boundary surface requires more regeneration time (4X: 0.13s versus 0.03s) to create the surface, and the boundary surface also had a crown that was slightly more prominent than the loft considering both used curvature to face constraints.

Refering to an example from the SolidWorks Surfacing and Complex Shape Modeling book on page 318 (chapter 17), a lofted surface was used on the open surface edges (figure 17.3) with guide curves to control the unconstrained edges of the loft surface. I suspect a boundary surface could have been used as a substitute for the loft, but what advantage would it offer as the model regeneration time would have been higher?