The Pet Rock
One famous example of how salesmanship can outweigh/outcompete even the best product designs is Gary Dahl's "Pet Rock":
Gary Dahl's Pet Rock is a product that was created and marketed in 1975 by advertising executive Gary Dahl.
It was a seemingly simple product, a smooth, polished rock that came packaged in a small cardboard box with air holes, and included a manual that provided "care and training" instructions for the rock.
Despite the fact that Pet Rock was just a common rock and had no real value to it, Dahl was able to sell over 1.5 million units within six months, due to his clever marketing and salesmanship.
He marketed the Pet Rock as a "low-maintenance pet" that could be taken anywhere and required no feeding or walking.
He also created a fictional history for the rocks, claiming they were a "rare" and "special" type of rock that had been hand-picked from a specific location.
Dahl's success with Pet Rocks illustrates how salesmanship and marketing can be more important than the product design itself.
He was able to create a demand for a product that had no real value by cleverly positioning it and creating a sense of nostalgia and rarity around it.
Pet Rock was not a great product design but it was a great sales and marketing campaign, which made it a successful product.
The initial success of the Pet Rock however quickly passed, as the product became discontinued in February 1976 due to lower sales