You can have the best design and engineering in the world, but if it's not executed properly because your labour workforce is sloppy (for whatever reason, whether it's negligence, or having to meet an insane quota) and the materials used are of questionable quality and durability, then design and engineering are meaningless.
What are people going to do if Prime 3.0 has a major endemic issue like Dinobot's shoulders? Or a retailer has to issue a PSA warning people not to use some of the features?