Zero edges are probably expensive to manufacture, as are full convex grinds. Part of why scrap yard knives keep such an amazingly good price to performance ratio is Dan's continued choice of simple yet effective grinds to minimize the amount of work that goes into manufacturing these knives.

Scrap yards have, in my experience, had better edges out of the box than Busse blades - I say keep our edges like they are, and if you want to reprofile them yourself, go nuts!