In the comparison between traditional launchers and the reusable Falcon 9 system, what became the primary cost driver for SpaceX?

Refurbishment and fuel.

The table comparing the old and new launch paradigms clearly illustrates the shift in the fundamental cost driver achieved by SpaceX's reusable system. For traditional expendable launchers, the cost was dictated by the manufacturing of every single component needed for every launch since the asset was destroyed after one use. In contrast, with the Falcon 9 reusable system, where the booster has a high recovery rate through refurbishment, the primary cost drivers for subsequent missions shift significantly to the costs associated with refurbishment processes and the fuel required for the next flight, leading to significantly reduced overall mission costs.