What didn't the duryea brothers do that Henry Ford did?

The Duryea brothers, Charles and Frank, focused on building the first gasoline-powered automobile and did not establish a mass production system for their vehicles. In contrast, Henry Ford revolutionized the automotive industry by implementing assembly line production techniques, significantly reducing costs and making cars affordable for the general public. This approach allowed Ford to scale production efficiently, leading to the widespread adoption of the automobile. While the Duryeas were pioneers in automotive engineering, Ford's innovations transformed the industry.